From patchwork Wed Oct 25 01:08:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Hawkins Jiawei X-Patchwork-Id: 13435383 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 6A3D6C07545 for ; Wed, 25 Oct 2023 01:09:04 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qvSNv-0000VV-Jh; Tue, 24 Oct 2023 21:08:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qvSNo-0000VC-SC for qemu-devel@nongnu.org; Tue, 24 Oct 2023 21:08:29 -0400 Received: from mail-pl1-x632.google.com ([2607:f8b0:4864:20::632]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qvSNn-0008Hx-0p for qemu-devel@nongnu.org; Tue, 24 Oct 2023 21:08:28 -0400 Received: by mail-pl1-x632.google.com with SMTP id d9443c01a7336-1c0ecb9a075so35945535ad.2 for ; Tue, 24 Oct 2023 18:08:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1698196105; x=1698800905; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=iqTJYJbb9nM6t9/9E/6lz2EsNdBEGzHkSWKAMwQOUXo=; b=fiXHyVfxLcp5rl29bx+RDSjU6zNBJ+xTCO3Sll1rB93P32e9U/C6IV/yhocp3Q05zz NtzFFL8XRnFkrohFn6NgP3276FwX3slDcg9JVchATtVxF16wjhtDeI3d97sj8Fup5AL6 S2Ld62+KS1Iz+9jEC5Cg7kqDoqcTV6WQRK6U31jooe5OYeGV1PSRVPN/Uazi6YWCEsmc djWL6/IzIHCKa4n/QH7/bIuIBXuVgvvK5qFzikifAb6KL0haIUANRpud0uaq7C/gRjkL UPlb9CcQFGsPMokdkT2pvY0znZwokIIOF1rgPwiQCWfdK82152O9yvNTqEWuJ41zNbl9 pXwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698196105; x=1698800905; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=iqTJYJbb9nM6t9/9E/6lz2EsNdBEGzHkSWKAMwQOUXo=; b=u0o1jcIbdjBV49ZiQ+2PxRGI2T/ptETvZYVjdct5kiJQmgIzpoudSRwhfOZVzjvJ0l YUkzEFt+qu1ku+GWKQ+QevF1nsNEIcG4oD5yT9BaO1qGiXZx+2eZX/1CazAUG5Y/zI6N WgtsNWAhcMmjEcmR75bI6DJp6Pn4nRiv0KQAlN5tY87IDwlYCLuXp5GhFBGgsAKIPXOu d2dEMkvlERnVQ6wfdrLgI4Gw859onKQo312uJ4WCzWfm9W8Clb02tfTfd6IGf7OiMFsk ug/cDPSNIiIJOYd7R2DNcVPNIXVSWKEVoHvZ98gC0eWDAL5q63G2+JpF0scuQQUZJPrH 5ibQ== X-Gm-Message-State: AOJu0YzBs909j63Cimm6bSvqgHF1N5TEzYm+TzX5GcdIBovGfUo08KHD PE7iGosrGLcMweCjWXktmPc= X-Google-Smtp-Source: AGHT+IF+P2p+t8Gxoc3erVof1lUkiVuW0sqTgn0t9KGJWHxDhPfqdJvz+fZZ+0OlSE1JFeA5ssnZcA== X-Received: by 2002:a17:902:f988:b0:1c3:2df4:8791 with SMTP id ky8-20020a170902f98800b001c32df48791mr10601471plb.27.1698196105266; Tue, 24 Oct 2023 18:08:25 -0700 (PDT) Received: from localhost ([183.242.254.166]) by smtp.gmail.com with ESMTPSA id jk15-20020a170903330f00b001b9d7c8f44dsm8040830plb.182.2023.10.24.18.08.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Oct 2023 18:08:24 -0700 (PDT) From: Hawkins Jiawei To: jasowang@redhat.com, mst@redhat.com, eperezma@redhat.com Cc: qemu-devel@nongnu.org, yin31149@gmail.com, 18801353760@163.com Subject: [PATCH v5 2/3] vdpa: Restore receive-side scaling state Date: Wed, 25 Oct 2023 09:08:05 +0800 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::632; envelope-from=yin31149@gmail.com; helo=mail-pl1-x632.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org This patch reuses vhost_vdpa_net_load_rss() with some refactorings to restore the receive-side scaling state at device's startup. Signed-off-by: Hawkins Jiawei Acked-by: Eugenio Pérez --- v5: - resolve conflict with the updated patch "Vhost-vdpa Shadow Virtqueue Hash calculation Support" v4: https://lore.kernel.org/all/79caf9bf05778ed5279e11bdd1f26b49baf373ce.1697904740.git.yin31149@gmail.com/ - add do_rss argument and relative code in vhost_vdpa_net_load_rss() v3: https://lore.kernel.org/all/47b17e160ba4e55b24790b7d73b22d2b437ebe3c.1693299194.git.yin31149@gmail.com/ - resolve conflict with updated patch "Vhost-vdpa Shadow Virtqueue Hash calculation Support" RFC v2: https://lore.kernel.org/all/af33aa80bc4ef0b2cec6c21b9448866c517fde80.1691926415.git.yin31149@gmail.com/ - Correct the feature usage to VIRTIO_NET_F_HASH_REPORT when loading the hash calculation state RFC v1: https://lore.kernel.org/all/93d5d82f0a5df71df326830033e50358c8b6be7a.1691766252.git.yin31149@gmail.com/ net/vhost-vdpa.c | 67 +++++++++++++++++++++++++++++++----------------- 1 file changed, 44 insertions(+), 23 deletions(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 3466936b87..a4cc1381fc 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -828,7 +828,7 @@ static int vhost_vdpa_net_load_mac(VhostVDPAState *s, const VirtIONet *n, static int vhost_vdpa_net_load_rss(VhostVDPAState *s, const VirtIONet *n, struct iovec *out_cursor, - struct iovec *in_cursor) + struct iovec *in_cursor, bool do_rss) { struct virtio_net_rss_config cfg = {}; ssize_t r; @@ -854,21 +854,35 @@ static int vhost_vdpa_net_load_rss(VhostVDPAState *s, const VirtIONet *n, sizeof(n->rss_data.indirections_table[0])); cfg.hash_types = cpu_to_le32(n->rss_data.hash_types); - /* - * According to VirtIO standard, "Field reserved MUST contain zeroes. - * It is defined to make the structure to match the layout of - * virtio_net_rss_config structure, defined in 5.1.6.5.7.". - * - * Therefore, we need to zero the fields in - * struct virtio_net_rss_config, which corresponds to the - * `reserved` field in struct virtio_net_hash_config. - * - * Note that all other fields are zeroed at their definitions, - * except for the `indirection_table` field, where the actual data - * is stored in the `table` variable to ensure compatibility - * with RSS case. Therefore, we need to zero the `table` variable here. - */ - table[0] = 0; + if (do_rss) { + /* + * According to VirtIO standard, "Number of entries in indirection_table + * is (indirection_table_mask + 1)". + */ + cfg.indirection_table_mask = cpu_to_le16(n->rss_data.indirections_len - + 1); + cfg.unclassified_queue = cpu_to_le16(n->rss_data.default_queue); + for (int i = 0; i < n->rss_data.indirections_len; ++i) { + table[i] = cpu_to_le16(n->rss_data.indirections_table[i]); + } + cfg.max_tx_vq = cpu_to_le16(n->curr_queue_pairs); + } else { + /* + * According to VirtIO standard, "Field reserved MUST contain zeroes. + * It is defined to make the structure to match the layout of + * virtio_net_rss_config structure, defined in 5.1.6.5.7.". + * + * Therefore, we need to zero the fields in + * struct virtio_net_rss_config, which corresponds to the + * `reserved` field in struct virtio_net_hash_config. + * + * Note that all other fields are zeroed at their definitions, + * except for the `indirection_table` field, where the actual data + * is stored in the `table` variable to ensure compatibility + * with RSS case. Therefore, we need to zero the `table` variable here. + */ + table[0] = 0; + } /* * Considering that virtio_net_handle_rss() currently does not restore @@ -899,6 +913,7 @@ static int vhost_vdpa_net_load_rss(VhostVDPAState *s, const VirtIONet *n, r = vhost_vdpa_net_load_cmd(s, out_cursor, in_cursor, VIRTIO_NET_CTRL_MQ, + do_rss ? VIRTIO_NET_CTRL_MQ_RSS_CONFIG : VIRTIO_NET_CTRL_MQ_HASH_CONFIG, data, ARRAY_SIZE(data)); if (unlikely(r < 0)) { @@ -933,13 +948,19 @@ static int vhost_vdpa_net_load_mq(VhostVDPAState *s, return r; } - if (!virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_HASH_REPORT)) { - return 0; - } - - r = vhost_vdpa_net_load_rss(s, n, out_cursor, in_cursor); - if (unlikely(r < 0)) { - return r; + if (virtio_vdev_has_feature(&n->parent_obj, VIRTIO_NET_F_RSS)) { + /* load the receive-side scaling state */ + r = vhost_vdpa_net_load_rss(s, n, out_cursor, in_cursor, true); + if (unlikely(r < 0)) { + return r; + } + } else if (virtio_vdev_has_feature(&n->parent_obj, + VIRTIO_NET_F_HASH_REPORT)) { + /* load the hash calculation state */ + r = vhost_vdpa_net_load_rss(s, n, out_cursor, in_cursor, false); + if (unlikely(r < 0)) { + return r; + } } return 0;