From patchwork Mon Apr 8 21:18:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Hemminger X-Patchwork-Id: 139193 X-Patchwork-Delegate: thomas@monjalon.net Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 721C243DD2; Mon, 8 Apr 2024 23:25:04 +0200 (CEST) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id B0AEF4068E; Mon, 8 Apr 2024 23:24:47 +0200 (CEST) Received: from mail-il1-f169.google.com (mail-il1-f169.google.com [209.85.166.169]) by mails.dpdk.org (Postfix) with ESMTP id 216534064C for ; Mon, 8 Apr 2024 23:24:45 +0200 (CEST) Received: by mail-il1-f169.google.com with SMTP id e9e14a558f8ab-36a0f64f5e0so14039735ab.3 for ; Mon, 08 Apr 2024 14:24:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1712611484; x=1713216284; darn=dpdk.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=QMpE4bJ02MY4VpUrTabgs0S4YJan2oEdqn4ZAnWdaHI=; b=A8sAmAU+/I1LZOR+UbkQDWOFx0RXy5YIPabEkfXtnDnKe482b5SMZh2zmcoea6rNX9 55fnl3Bigzx5vN/c3S4JJtNeXwahkP1e7EoT7t7rsmnmE99Jxf0SKFj3Ojyo/TOKMJSk bMfukDU9Agq/PFAE/+p4pxH6+s8B4DL9maxjDonNLIBzUktUH4EZY8HBrMQwICquJvHP BUSOz7qyWhbFsmyXT5tDJDAD4a15r3ncjozEAYRN+LGlbIQGsvLYkmVoO9XXeNSQC8tz 3EzjRvLbALPzsRTxxH+9fdaZ1zzxsB8B8emVDHTSZfMZd52dyG5jAi8gW6C/DDYzGgoO N9OQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712611484; x=1713216284; 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=QMpE4bJ02MY4VpUrTabgs0S4YJan2oEdqn4ZAnWdaHI=; b=K/fNEC6NNzL8H5A79rlz++vh1CggOxnSVKUK/NSZkk06Z76iO0/yzmuN00WwjfWAqU EM+7RWUpLrcbdL5+2bDU8CcD8oLJ29tfxjI2V+JY2mJNuJNOe78cpVOwkQyHlI2MDhYG VUpXcYFP4Bxhp+m41THHn1wHV18Z2fzbUZc+5MGM/ZV8n5OobwJxNGrUFEuu3HyQJWYK Dv430uAYBlDQJW/mt9raDKI8IpP0Of2obmOUfSBJdzunedpHceyxxmwXOrnLcgO67/OV /m4MFvY+aSfJ6dnk1ujT2mzTc1EEKWH8jQedfwED8kezFIFFJimPv4bvbrPfKi/w8SPU 1ojQ== X-Gm-Message-State: AOJu0YwSfIyj0Qac6cvhg5VY2RGqBsC0jEdCLplzqFZyQydxq2Yj+bbh nXpRej5jsyJ6/YlBgzVlyviC8LCt2XJYFhuc57fqdjH++/vvpvPh8z8LjjhHxhj20hGFbw9PDXQ 9Bhw= X-Google-Smtp-Source: AGHT+IHvoTGGI6wOHJW/vaZYZ5CPFT9VzK7qNr3hnScjrNr0W5+Pe1yQR6q8n+ImkYv82cT1fLXBNw== X-Received: by 2002:a05:6e02:1fe5:b0:36a:2cb9:127 with SMTP id dt5-20020a056e021fe500b0036a2cb90127mr1979064ilb.32.1712611484285; Mon, 08 Apr 2024 14:24:44 -0700 (PDT) Received: from hermes.lan (204-195-96-226.wavecable.com. [204.195.96.226]) by smtp.gmail.com with ESMTPSA id f16-20020a633810000000b005e43cce33f8sm6924725pga.88.2024.04.08.14.24.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Apr 2024 14:24:43 -0700 (PDT) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger Subject: [PATCH v7 3/8] net/tap: validate and setup parameters for BPF RSS Date: Mon, 8 Apr 2024 14:18:34 -0700 Message-ID: <20240408212438.414099-4-stephen@networkplumber.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240408212438.414099-1-stephen@networkplumber.org> References: <20240130034925.44869-1-stephen@networkplumber.org> <20240408212438.414099-1-stephen@networkplumber.org> MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The flow RSS support via BPF was not using the key, or hash type parameters. Which is good because they were never properly setup. Fix the setup and validate the flow parameters, the BPF side gets fixed later. Signed-off-by: Stephen Hemminger --- drivers/net/tap/tap_flow.c | 65 +++++++++++++++++++++++++++++++++++--- drivers/net/tap/tap_rss.h | 5 ++- 2 files changed, 62 insertions(+), 8 deletions(-) diff --git a/drivers/net/tap/tap_flow.c b/drivers/net/tap/tap_flow.c index 8fccd599f0..8cf64364a7 100644 --- a/drivers/net/tap/tap_flow.c +++ b/drivers/net/tap/tap_flow.c @@ -11,9 +11,11 @@ #include #include +#include #include #include #include + #include #include #include @@ -2061,6 +2063,21 @@ static int bpf_rss_key(enum bpf_rss_key_e cmd, __u32 *key_idx) return err; } + +/* Default RSS hash key also used by mlx devices */ +static const uint8_t rss_hash_default_key[] = { + 0x2c, 0xc6, 0x81, 0xd1, + 0x5b, 0xdb, 0xf4, 0xf7, + 0xfc, 0xa2, 0x83, 0x19, + 0xdb, 0x1a, 0x3e, 0x94, + 0x6b, 0x9e, 0x38, 0xd9, + 0x2c, 0x9c, 0x03, 0xd1, + 0xad, 0x99, 0x44, 0xa7, + 0xd9, 0x56, 0x3d, 0x59, + 0x06, 0x3c, 0x25, 0xf3, + 0xfc, 0x1f, 0xdc, 0x2a, +}; + /** * Add RSS hash calculations and queue selection * @@ -2079,11 +2096,11 @@ static int rss_add_actions(struct rte_flow *flow, struct pmd_internals *pmd, const struct rte_flow_action_rss *rss, struct rte_flow_error *error) { - /* 4096 is the maximum number of instructions for a BPF program */ + struct rss_key rss_entry = { }; + const uint8_t *key_in; + uint32_t hash_type = 0; unsigned int i; int err; - struct rss_key rss_entry = { .hash_fields = 0, - .key_size = 0 }; /* Check supported RSS features */ if (rss->func != RTE_ETH_HASH_FUNCTION_DEFAULT) @@ -2095,6 +2112,41 @@ static int rss_add_actions(struct rte_flow *flow, struct pmd_internals *pmd, (error, ENOTSUP, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL, "a nonzero RSS encapsulation level is not supported"); + if (rss->queue_num == 0 || rss->queue_num >= TAP_MAX_QUEUES) + return rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL, + "invalid number of queues"); + + /* allow RSS key_len 0 in case of NULL (default) RSS key. */ + if (rss->key_len == 0) { + if (rss->key != NULL) + return rte_flow_error_set(error, ENOTSUP, + RTE_FLOW_ERROR_TYPE_ACTION_CONF, + &rss->key_len, "RSS hash key length 0"); + key_in = rss_hash_default_key; + } else { + if (rss->key_len != TAP_RSS_HASH_KEY_SIZE) + return rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, "RSS hash invalid key length"); + if (rss->key == NULL) + return rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, "RSS hash key is NULL"); + key_in = rss->key; + } + + if (rss->types & TAP_RSS_HF_MASK) + return rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, "RSS hash type not supported"); + + if (rss->types & (RTE_ETH_RSS_NONFRAG_IPV4_UDP | RTE_ETH_RSS_NONFRAG_IPV4_TCP)) + hash_type |= RTE_BIT32(HASH_FIELD_IPV4_L3_L4); + else if (rss->types & (RTE_ETH_RSS_IPV4 | RTE_ETH_RSS_FRAG_IPV4)) + hash_type |= RTE_BIT32(HASH_FIELD_IPV4_L3); + + if (rss->types & (RTE_ETH_RSS_NONFRAG_IPV6_UDP | RTE_ETH_RSS_NONFRAG_IPV6_TCP)) + hash_type |= RTE_BIT32(HASH_FIELD_IPV6_L3_L4); + else if (rss->types & (RTE_ETH_RSS_IPV6 | RTE_ETH_RSS_FRAG_IPV6 | RTE_ETH_RSS_IPV6_EX)) + hash_type |= RTE_BIT32(HASH_FIELD_IPV6_L3); + /* Get a new map key for a new RSS rule */ err = bpf_rss_key(KEY_CMD_GET, &flow->key_idx); if (err < 0) { @@ -2109,8 +2161,11 @@ static int rss_add_actions(struct rte_flow *flow, struct pmd_internals *pmd, rss_entry.nb_queues = rss->queue_num; for (i = 0; i < rss->queue_num; i++) rss_entry.queues[i] = rss->queue[i]; - rss_entry.hash_fields = - (1 << HASH_FIELD_IPV4_L3_L4) | (1 << HASH_FIELD_IPV6_L3_L4); + + rss_entry.hash_fields = hash_type; + rte_convert_rss_key((const uint32_t *)key_in, (uint32_t *)rss_entry.key, + TAP_RSS_HASH_KEY_SIZE); + /* Add this RSS entry to map */ err = tap_flow_bpf_update_rss_elem(pmd->map_fd, diff --git a/drivers/net/tap/tap_rss.h b/drivers/net/tap/tap_rss.h index 8766ffc244..6009be7031 100644 --- a/drivers/net/tap/tap_rss.h +++ b/drivers/net/tap/tap_rss.h @@ -24,11 +24,10 @@ enum hash_field { }; struct rss_key { - __u8 key[128]; __u32 hash_fields; - __u32 key_size; - __u32 queues[TAP_MAX_QUEUES]; + __u8 key[TAP_RSS_HASH_KEY_SIZE]; __u32 nb_queues; + __u32 queues[TAP_MAX_QUEUES]; } __attribute__((packed)); #endif /* _TAP_RSS_H_ */