From patchwork Tue Mar 7 14:54:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 13163883 X-Patchwork-Delegate: kuba@kernel.org 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFB8CC678D5 for ; Tue, 7 Mar 2023 15:03:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230104AbjCGPDq (ORCPT ); Tue, 7 Mar 2023 10:03:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46214 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230163AbjCGPDP (ORCPT ); Tue, 7 Mar 2023 10:03:15 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2F1A81CDF; Tue, 7 Mar 2023 06:54:37 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 63C6761265; Tue, 7 Mar 2023 14:54:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 77DECC433EF; Tue, 7 Mar 2023 14:54:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1678200876; bh=H4sA8nnBZcXuU7xmYpYEdn+Hznwwav+YgudjUw2OK5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jkSEh6unBU4y84kIXZd4E2tCYOq5behXj5dJtB1C6TqyKspoqs9dI0I0IHzrL80I2 UhQWCVkZ3C5yLFyRIh17B5lDzs5TUHs+fiv3VA9ErP7TjNkEKxb6E8foGvuLyM6otv LghX/iwJWsLrMBbZDEmvtPl4yd2D/E4PPqFQtpLnW0clCHNJFOeAdaoXd8xEanpDE/ DL0wIBnd+Gm+ThWazXa88hbNs+aU78syMhtQslU+1WGN09icR0WH9EvSSS4BC2QlMC /WJE2X8ePt5RvICDYAE8gZPUlHjMV7gUSQjPAXId2rBIuLS8lTxbZJw79gzkB5NZxr zjv1jqCCARnwg== From: Lorenzo Bianconi To: netdev@vger.kernel.org Cc: bpf@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, saeedm@nvidia.com, tariqt@nvidia.com, leon@kernel.org, shayagr@amazon.com, akiyano@amazon.com, darinzon@amazon.com, sgoutham@marvell.com, lorenzo.bianconi@redhat.com, toke@redhat.com, teknoraver@meta.com Subject: [PATCH net-next 3/8] xdp: add xdp_set_features_flag utility routine Date: Tue, 7 Mar 2023 15:54:00 +0100 Message-Id: X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Introduce xdp_set_features_flag utility routine in order to update dynamically xdp_features according to the dynamic hw configuration via ethtool (e.g. changing number of hw rx/tx queues). Add xdp_clear_features_flag() in order to clear all xdp_feature flag. Signed-off-by: Lorenzo Bianconi --- Documentation/netlink/specs/netdev.yaml | 1 + include/net/xdp.h | 11 +++++++++++ include/uapi/linux/netdev.h | 2 ++ net/core/xdp.c | 26 ++++++++++++++++++------- tools/include/uapi/linux/netdev.h | 2 ++ tools/net/ynl/ynl-gen-c.py | 2 +- 6 files changed, 36 insertions(+), 8 deletions(-) diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml index cffef09729f1..7e4a5b4e7162 100644 --- a/Documentation/netlink/specs/netdev.yaml +++ b/Documentation/netlink/specs/netdev.yaml @@ -7,6 +7,7 @@ definitions: - type: flags name: xdp-act + render-max: true entries: - name: basic diff --git a/include/net/xdp.h b/include/net/xdp.h index d517bfac937b..41c57b8b1671 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -428,12 +428,18 @@ MAX_XDP_METADATA_KFUNC, #ifdef CONFIG_NET u32 bpf_xdp_metadata_kfunc_id(int id); bool bpf_dev_bound_kfunc_id(u32 btf_id); +void xdp_set_features_flag(struct net_device *dev, xdp_features_t val); void xdp_features_set_redirect_target(struct net_device *dev, bool support_sg); void xdp_features_clear_redirect_target(struct net_device *dev); #else static inline u32 bpf_xdp_metadata_kfunc_id(int id) { return 0; } static inline bool bpf_dev_bound_kfunc_id(u32 btf_id) { return false; } +static inline void +xdp_set_features_flag(struct net_device *dev, xdp_features_t val) +{ +} + static inline void xdp_features_set_redirect_target(struct net_device *dev, bool support_sg) { @@ -445,4 +451,9 @@ xdp_features_clear_redirect_target(struct net_device *dev) } #endif +static inline void xdp_clear_features_flag(struct net_device *dev) +{ + xdp_set_features_flag(dev, 0); +} + #endif /* __LINUX_NET_XDP_H__ */ diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h index 588391447bfb..497cfc93f2e3 100644 --- a/include/uapi/linux/netdev.h +++ b/include/uapi/linux/netdev.h @@ -33,6 +33,8 @@ enum netdev_xdp_act { NETDEV_XDP_ACT_HW_OFFLOAD = 16, NETDEV_XDP_ACT_RX_SG = 32, NETDEV_XDP_ACT_NDO_XMIT_SG = 64, + + NETDEV_XDP_ACT_MASK = 127, }; enum { diff --git a/net/core/xdp.c b/net/core/xdp.c index 8c92fc553317..87e654b7d06c 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -774,20 +774,32 @@ static int __init xdp_metadata_init(void) } late_initcall(xdp_metadata_init); -void xdp_features_set_redirect_target(struct net_device *dev, bool support_sg) +void xdp_set_features_flag(struct net_device *dev, xdp_features_t val) { - dev->xdp_features |= NETDEV_XDP_ACT_NDO_XMIT; - if (support_sg) - dev->xdp_features |= NETDEV_XDP_ACT_NDO_XMIT_SG; + val &= NETDEV_XDP_ACT_MASK; + if (dev->xdp_features == val) + return; + dev->xdp_features = val; call_netdevice_notifiers(NETDEV_XDP_FEAT_CHANGE, dev); } +EXPORT_SYMBOL_GPL(xdp_set_features_flag); + +void xdp_features_set_redirect_target(struct net_device *dev, bool support_sg) +{ + xdp_features_t val = (dev->xdp_features | NETDEV_XDP_ACT_NDO_XMIT); + + if (support_sg) + val |= NETDEV_XDP_ACT_NDO_XMIT_SG; + xdp_set_features_flag(dev, val); +} EXPORT_SYMBOL_GPL(xdp_features_set_redirect_target); void xdp_features_clear_redirect_target(struct net_device *dev) { - dev->xdp_features &= ~(NETDEV_XDP_ACT_NDO_XMIT | - NETDEV_XDP_ACT_NDO_XMIT_SG); - call_netdevice_notifiers(NETDEV_XDP_FEAT_CHANGE, dev); + xdp_features_t val = dev->xdp_features; + + val &= ~(NETDEV_XDP_ACT_NDO_XMIT | NETDEV_XDP_ACT_NDO_XMIT_SG); + xdp_set_features_flag(dev, val); } EXPORT_SYMBOL_GPL(xdp_features_clear_redirect_target); diff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h index 588391447bfb..497cfc93f2e3 100644 --- a/tools/include/uapi/linux/netdev.h +++ b/tools/include/uapi/linux/netdev.h @@ -33,6 +33,8 @@ enum netdev_xdp_act { NETDEV_XDP_ACT_HW_OFFLOAD = 16, NETDEV_XDP_ACT_RX_SG = 32, NETDEV_XDP_ACT_NDO_XMIT_SG = 64, + + NETDEV_XDP_ACT_MASK = 127, }; enum { diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py index 0d6df9414aa9..feb86f043e3b 100755 --- a/tools/net/ynl/ynl-gen-c.py +++ b/tools/net/ynl/ynl-gen-c.py @@ -1995,7 +1995,7 @@ def render_uapi(family, cw): cw.nl() if const['type'] == 'flags': max_name = c_upper(name_pfx + 'mask') - max_val = f' = {(entry.user_value() << 1) - 1},' + max_val = f' = {enum.get_mask()},' cw.p(max_name + max_val) else: max_name = c_upper(name_pfx + 'max')