From patchwork Wed Nov 9 11:41:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steen Hegelund X-Patchwork-Id: 13037440 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 448B9C4332F for ; Wed, 9 Nov 2022 11:43:23 +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:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=X7L1PMPljlufdcsuciZt0sVgj+NDWiUrikcBtisGM7c=; b=Czo2DT5j28P0qk m+o5r5AJtdj2qrSm7J/VEzwvqu7HUvp/79dbTGmIHrBUPbhXTxPdF8X0lOA6myRBluFD6vPGwkeR2 5IgxGytvCttzznVnGPY0svlaWuuwMHzVF7HY1yEjh8pIxMk8kzxwYQWhG3NbYP7aKvb0X3dDZ9er2 inDF7PN7KMSU0eBSpefo/Kbv42+LoblB1mU9iCSS1D7R5GlFLU9lZPc+/N1B0k3pcGIRRbL8HYJBE YWNAKsRJrgYUYn7mud31CjeAxn8W9+mHtU/J3aKItgk9mW7rk3K7Ho6Lp7NEpzvJz/PzMkdKeYY7T zT7lKvEUfdP5uxNa2azQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1osjTA-00D3zc-1B; Wed, 09 Nov 2022 11:42:12 +0000 Received: from esa.microchip.iphmx.com ([68.232.154.123]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1osjSd-00D3Ko-Oe for linux-arm-kernel@lists.infradead.org; Wed, 09 Nov 2022 11:41:41 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1667994099; x=1699530099; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=wBCOxA7WJXdt7G0lShoOFr9b7beloTsvHAdHql0j8SE=; b=rPKyaZda+yGuACnW15opnLDSR8Win9bVlLbS1kPSfUikH0RzKqkevVaY I1ZE3KmrIWMZAjJGw4sYwiI3viNKpxNOwSyL8+NIqJU4rxMjeNSZbUmIX ZPFSQG7BksuR4Hsn/Ul3ysfbeigBpMTS6rCmp/CZz+OA4u9MM7SNQMOwb Jyu2l3Us1FMx0oBgtSk6mcMIq+57evWe6XS0UWlt4LE1YYuCsiMLKJlRd UaE8q+w5SMnyYRBwYnHAA9xDnbZnb6WefY1iUoYm38A0cYhmOCZ2bsMIm i1/h373aGLFJPNzYRGXTs/Z0tppTNnZ16k6TOaInv4rbjyUO4ORwWVq1b Q==; X-IronPort-AV: E=Sophos;i="5.96,150,1665471600"; d="scan'208";a="186099253" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 09 Nov 2022 04:41:39 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Wed, 9 Nov 2022 04:41:36 -0700 Received: from den-dk-m31857.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.12 via Frontend Transport; Wed, 9 Nov 2022 04:41:33 -0700 From: Steen Hegelund To: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni CC: Steen Hegelund , , Randy Dunlap , "Casper Andersson" , Russell King , Wan Jiabing , "Nathan Huckleberry" , , , , "Daniel Machon" , Horatiu Vultur , Lars Povlsen Subject: [PATCH net-next v6 4/8] net: microchip: sparx5: Adding TC goto action and action checking Date: Wed, 9 Nov 2022 12:41:12 +0100 Message-ID: <20221109114116.3612477-5-steen.hegelund@microchip.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221109114116.3612477-1-steen.hegelund@microchip.com> References: <20221109114116.3612477-1-steen.hegelund@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221109_034139_920141_B6300714 X-CRM114-Status: GOOD ( 22.00 ) 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 support for a goto action and ensure that a HW offloaded TC flower filter has a valid goto action and that pass and trap actions are not both used in the same filter. Signed-off-by: Steen Hegelund --- .../microchip/sparx5/sparx5_tc_flower.c | 70 ++++++++++++++++--- .../net/ethernet/microchip/vcap/vcap_api.c | 36 ++++++++++ .../ethernet/microchip/vcap/vcap_api_client.h | 2 + 3 files changed, 100 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c index 13bc6bff4c1e..6cd29d3c9250 100644 --- a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c @@ -464,6 +464,60 @@ static int sparx5_tc_use_dissectors(struct flow_cls_offload *fco, return err; } +static int sparx5_tc_flower_action_check(struct vcap_control *vctrl, + struct flow_cls_offload *fco, + struct vcap_admin *admin) +{ + struct flow_rule *rule = flow_cls_offload_flow_rule(fco); + struct flow_action_entry *actent, *last_actent = NULL; + struct flow_action *act = &rule->action; + u64 action_mask = 0; + int idx; + + if (!flow_action_has_entries(act)) { + NL_SET_ERR_MSG_MOD(fco->common.extack, "No actions"); + return -EINVAL; + } + + if (!flow_action_basic_hw_stats_check(act, fco->common.extack)) + return -EOPNOTSUPP; + + flow_action_for_each(idx, actent, act) { + if (action_mask & BIT(actent->id)) { + NL_SET_ERR_MSG_MOD(fco->common.extack, + "More actions of the same type"); + return -EINVAL; + } + action_mask |= BIT(actent->id); + last_actent = actent; /* Save last action for later check */ + } + + /* Check that last action is a goto */ + if (last_actent->id != FLOW_ACTION_GOTO) { + NL_SET_ERR_MSG_MOD(fco->common.extack, + "Last action must be 'goto'"); + return -EINVAL; + } + + /* Check if the goto chain is in the next lookup */ + if (!vcap_is_next_lookup(vctrl, fco->common.chain_index, + last_actent->chain_index)) { + NL_SET_ERR_MSG_MOD(fco->common.extack, + "Invalid goto chain"); + return -EINVAL; + } + + /* Catch unsupported combinations of actions */ + if (action_mask & BIT(FLOW_ACTION_TRAP) && + action_mask & BIT(FLOW_ACTION_ACCEPT)) { + NL_SET_ERR_MSG_MOD(fco->common.extack, + "Cannot combine pass and trap action"); + return -EOPNOTSUPP; + } + + return 0; +} + static int sparx5_tc_flower_replace(struct net_device *ndev, struct flow_cls_offload *fco, struct vcap_admin *admin) @@ -475,16 +529,12 @@ static int sparx5_tc_flower_replace(struct net_device *ndev, struct vcap_rule *vrule; int err, idx; - frule = flow_cls_offload_flow_rule(fco); - if (!flow_action_has_entries(&frule->action)) { - NL_SET_ERR_MSG_MOD(fco->common.extack, "No actions"); - return -EINVAL; - } + vctrl = port->sparx5->vcap_ctrl; - if (!flow_action_basic_hw_stats_check(&frule->action, fco->common.extack)) - return -EOPNOTSUPP; + err = sparx5_tc_flower_action_check(vctrl, fco, admin); + if (err) + return err; - vctrl = port->sparx5->vcap_ctrl; vrule = vcap_alloc_rule(vctrl, ndev, fco->common.chain_index, VCAP_USER_TC, fco->common.prio, 0); if (IS_ERR(vrule)) @@ -492,6 +542,7 @@ static int sparx5_tc_flower_replace(struct net_device *ndev, vrule->cookie = fco->cookie; sparx5_tc_use_dissectors(fco, admin, vrule); + frule = flow_cls_offload_flow_rule(fco); flow_action_for_each(idx, act, &frule->action) { switch (act->id) { case FLOW_ACTION_TRAP: @@ -521,6 +572,9 @@ static int sparx5_tc_flower_replace(struct net_device *ndev, if (err) goto out; break; + case FLOW_ACTION_GOTO: + /* Links between VCAPs will be added later */ + break; default: NL_SET_ERR_MSG_MOD(fco->common.extack, "Unsupported TC action"); diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api.c b/drivers/net/ethernet/microchip/vcap/vcap_api.c index d5b62e43d83f..0dd9637933b2 100644 --- a/drivers/net/ethernet/microchip/vcap/vcap_api.c +++ b/drivers/net/ethernet/microchip/vcap/vcap_api.c @@ -677,6 +677,42 @@ struct vcap_admin *vcap_find_admin(struct vcap_control *vctrl, int cid) } EXPORT_SYMBOL_GPL(vcap_find_admin); +/* Is the next chain id in the following lookup, possible in another VCAP */ +bool vcap_is_next_lookup(struct vcap_control *vctrl, int cur_cid, int next_cid) +{ + struct vcap_admin *admin, *next_admin; + int lookup, next_lookup; + + /* The offset must be at least one lookup */ + if (next_cid < cur_cid + VCAP_CID_LOOKUP_SIZE) + return false; + + if (vcap_api_check(vctrl)) + return false; + + admin = vcap_find_admin(vctrl, cur_cid); + if (!admin) + return false; + + /* If no VCAP contains the next chain, the next chain must be beyond + * the last chain in the current VCAP + */ + next_admin = vcap_find_admin(vctrl, next_cid); + if (!next_admin) + return next_cid > admin->last_cid; + + lookup = vcap_chain_id_to_lookup(admin, cur_cid); + next_lookup = vcap_chain_id_to_lookup(next_admin, next_cid); + + /* Next lookup must be the following lookup */ + if (admin == next_admin || admin->vtype == next_admin->vtype) + return next_lookup == lookup + 1; + + /* Must be the first lookup in the next VCAP instance */ + return next_lookup == 0; +} +EXPORT_SYMBOL_GPL(vcap_is_next_lookup); + /* Check if there is room for a new rule */ static int vcap_rule_space(struct vcap_admin *admin, int size) { diff --git a/drivers/net/ethernet/microchip/vcap/vcap_api_client.h b/drivers/net/ethernet/microchip/vcap/vcap_api_client.h index 7d9a227ef834..5cecb12edec2 100644 --- a/drivers/net/ethernet/microchip/vcap/vcap_api_client.h +++ b/drivers/net/ethernet/microchip/vcap/vcap_api_client.h @@ -193,6 +193,8 @@ const struct vcap_field *vcap_lookup_keyfield(struct vcap_rule *rule, enum vcap_key_field key); /* Find a rule id with a provided cookie */ int vcap_lookup_rule_by_cookie(struct vcap_control *vctrl, u64 cookie); +/* Is the next chain id in the following lookup, possible in another VCAP */ +bool vcap_is_next_lookup(struct vcap_control *vctrl, int cur_cid, int next_cid); /* Copy to host byte order */ void vcap_netbytes_copy(u8 *dst, u8 *src, int count);