From patchwork Wed Feb 7 22:11:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Hemminger X-Patchwork-Id: 136507 X-Patchwork-Delegate: ferruh.yigit@amd.com 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 84FE243AAD; Wed, 7 Feb 2024 23:16:43 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 7B80F42E00; Wed, 7 Feb 2024 23:16:30 +0100 (CET) Received: from mail-pf1-f174.google.com (mail-pf1-f174.google.com [209.85.210.174]) by mails.dpdk.org (Postfix) with ESMTP id 439A240268 for ; Wed, 7 Feb 2024 23:16:27 +0100 (CET) Received: by mail-pf1-f174.google.com with SMTP id d2e1a72fcca58-6e071953676so407586b3a.2 for ; Wed, 07 Feb 2024 14:16:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=networkplumber-org.20230601.gappssmtp.com; s=20230601; t=1707344186; x=1707948986; 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=klwclTwCg/MXy6mC0AM+H8Mght/ByiOBM7aYphZ4FYI=; b=T3c9VD1BFlbAQlUSYKk3VrMTrdcnB+I5fF5zu4j79Wsdg6SmzQWl8hMar5Rkd05Lnt MBs89FjD7NBeBlYIXib4geHQpPyCYApKaeACZxAlSWGxD4ZtHaiw6vykvU3k7GNVagJ3 gb54aueQ0KJ8UHHpmBzL7zu1+cS8hL54AsGOdQfIq2/fGEa86BYoDHT1MmZeGyZQT4qZ D6kVfhv4Ke0wsafEAOkdpCSxNlCZ/vKVLIWVZ3dQIp3drHCfXVOG25ZZJkcgPvXwhQlA lz9QnRr6uhUAkJkuP92V8RoYlcrSbdEUKDtS0VTLu8/mW1q5/9gfFaPDn2yGIkaGeFqO sKYA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1707344186; x=1707948986; 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=klwclTwCg/MXy6mC0AM+H8Mght/ByiOBM7aYphZ4FYI=; b=QW4hb/aa53yoaxN1EQmzcETKLA+Tt5WxQJp1f7CsF4bQ4/Yv9QoRuJ5x3IvLUfOCxJ vxHTl1cqme7c1npjeWNQwrTBk/4o79BtOzv59cCeX6FaCWG1q+W8J26TIfNVk1Vq/tvN Lki0hohYb3dNgaERdR1dSPoyNNnpFPwD1zG9YBL+lNoiSd6z4M9/OCB9flXEbDlR0lwG rAlzlz0rjzJ5ETDWYVnUBbfir8QB632qdFHUti0TOHz/lfC5mGV0kl5R1/pXHZCXaGbX gzSuztaQ2/sAmQMgut5pv0k+J3RAzNZcWOvRYX1goukbu8XIccjv069pKMmOpyz4YZ5s 1Suw== X-Gm-Message-State: AOJu0YzB/BNDyy8jCpY6knGavh893TDgXl9ISdBU3oXKbLajfNfBUUNX t1qWPslUNN5++r46XfvI9s04ynFeW62+Gso/7iP1UfGhHTacAJ4xGvbc/S/qlabCqj9ETrHjzVl 9NSo= X-Google-Smtp-Source: AGHT+IEfZvO5ANqN6o7EspNCL/GKRTDjdVQQ0grRRjpnLUWLA7KqJb3UlQTnJ0nnjX2BrEUI/fzzOQ== X-Received: by 2002:a05:6a00:92a9:b0:6df:dde5:6025 with SMTP id jw41-20020a056a0092a900b006dfdde56025mr5564976pfb.4.1707344186419; Wed, 07 Feb 2024 14:16:26 -0800 (PST) Received: from hermes.lan (204-195-123-141.wavecable.com. [204.195.123.141]) by smtp.gmail.com with ESMTPSA id w70-20020a638249000000b005d5445349edsm2166075pgd.19.2024.02.07.14.16.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Feb 2024 14:16:26 -0800 (PST) From: Stephen Hemminger To: dev@dpdk.org Cc: Stephen Hemminger Subject: [PATCH v2 2/7] net/tap: validate and setup parameters for BPF RSS Date: Wed, 7 Feb 2024 14:11:20 -0800 Message-ID: <20240207221623.195157-3-stephen@networkplumber.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240207221623.195157-1-stephen@networkplumber.org> References: <20240130034925.44869-1-stephen@networkplumber.org> <20240207221623.195157-1-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_bpf_insns.h | 16 ++++---- drivers/net/tap/tap_flow.c | 65 ++++++++++++++++++++++++++++++--- drivers/net/tap/tap_rss.h | 5 +-- 3 files changed, 70 insertions(+), 16 deletions(-) diff --git a/drivers/net/tap/tap_bpf_insns.h b/drivers/net/tap/tap_bpf_insns.h index 53fa76c4e6b0..ee26cf885ed7 100644 --- a/drivers/net/tap/tap_bpf_insns.h +++ b/drivers/net/tap/tap_bpf_insns.h @@ -1709,13 +1709,13 @@ static struct bpf_insn l3_l4_hash_insns[] = { {0x57, 1, 0, 0, 0x00000001}, {0x15, 1, 0, 1, 0x00000000}, {0xa7, 3, 0, 0, 0xfe0fee15}, - {0x71, 1, 0, 201, 0x00000000}, + {0x71, 1, 0, 45, 0x00000000}, {0x67, 1, 0, 0, 0x00000008}, - {0x71, 2, 0, 200, 0x00000000}, + {0x71, 2, 0, 44, 0x00000000}, {0x4f, 1, 2, 0, 0x00000000}, - {0x71, 2, 0, 202, 0x00000000}, + {0x71, 2, 0, 46, 0x00000000}, {0x67, 2, 0, 0, 0x00000010}, - {0x71, 4, 0, 203, 0x00000000}, + {0x71, 4, 0, 47, 0x00000000}, {0x67, 4, 0, 0, 0x00000018}, {0x4f, 4, 2, 0, 0x00000000}, {0x4f, 4, 1, 0, 0x00000000}, @@ -1725,13 +1725,13 @@ static struct bpf_insn l3_l4_hash_insns[] = { {0x57, 3, 0, 0, 0x0000000f}, {0x67, 3, 0, 0, 0x00000002}, {0x0f, 0, 3, 0, 0x00000000}, - {0x71, 1, 0, 137, 0x00000000}, + {0x71, 1, 0, 49, 0x00000000}, {0x67, 1, 0, 0, 0x00000008}, - {0x71, 2, 0, 136, 0x00000000}, + {0x71, 2, 0, 48, 0x00000000}, {0x4f, 1, 2, 0, 0x00000000}, - {0x71, 2, 0, 138, 0x00000000}, + {0x71, 2, 0, 50, 0x00000000}, {0x67, 2, 0, 0, 0x00000010}, - {0x71, 3, 0, 139, 0x00000000}, + {0x71, 3, 0, 51, 0x00000000}, {0x67, 3, 0, 0, 0x00000018}, {0x4f, 3, 2, 0, 0x00000000}, {0x4f, 3, 1, 0, 0x00000000}, diff --git a/drivers/net/tap/tap_flow.c b/drivers/net/tap/tap_flow.c index ed4d42f92f9f..cd49aa51c8b0 100644 --- a/drivers/net/tap/tap_flow.c +++ b/drivers/net/tap/tap_flow.c @@ -11,8 +11,10 @@ #include #include +#include #include #include + #include #include #include @@ -2053,6 +2055,21 @@ 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 * @@ -2071,11 +2088,11 @@ 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) @@ -2087,6 +2104,41 @@ 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) { @@ -2101,8 +2153,11 @@ 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 8766ffc244f6..6009be7031b0 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_ */