From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <dev-bounces@dpdk.org> Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id AAADE46079; Tue, 14 Jan 2025 02:25:06 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 2484040678; Tue, 14 Jan 2025 02:23:58 +0100 (CET) Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by mails.dpdk.org (Postfix) with ESMTP id 64EBA402DA for <dev@dpdk.org>; Tue, 14 Jan 2025 02:23:37 +0100 (CET) Received: by linux.microsoft.com (Postfix, from userid 1213) id D819920591AE; Mon, 13 Jan 2025 17:23:35 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com D819920591AE DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1736817815; bh=ecMmGuWmxVplUdVa8H08YmqO+U95G5aJplFvsZ1UTr0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hoIEN/kGGk84NXYhSkfAKNVWeTka6zFBTY86+ThH2gm+YuQl+ynsMUY2rvS2nXv0a bJkSAONbXUPAt7cTA4ZQAFEmZw69epxL+tReby9jTP8/6Pqumhg3hkFL28wIGb9748 MxEtjvYywUqf1760ntxTkzAAfZLriAqxiQqSeGvU= From: Andre Muezerie <andremue@linux.microsoft.com> To: dev@dpdk.org Cc: konstantin.ananyev@huawei.com, thomas@monjalon.net, david.marchand@redhat.com Subject: [PATCH v15 10/60] net/ixgbe: remove use of VLAs Date: Mon, 13 Jan 2025 17:22:22 -0800 Message-Id: <1736817792-24967-11-git-send-email-andremue@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1736817792-24967-1-git-send-email-andremue@linux.microsoft.com> References: <1713397319-26135-1-git-send-email-roretzla@linux.microsoft.com> <1736817792-24967-1-git-send-email-andremue@linux.microsoft.com> X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org From: Konstantin Ananyev <konstantin.ananyev@huawei.com> 1) ../drivers/net/ixgbe/ixgbe_ethdev.c:3556:46: warning: variable length array used [-Wvla] 2) ../drivers/net/ixgbe/ixgbe_ethdev.c:3739:23: warning: variable length array used [-Wvla] 3) ../drivers/net/ixgbe/ixgbe_rxtx_vec_common.h:17:24: warning: variable length array used [-Wvla] For first two cases: in fact ixgbe_xstats_calc_num() always returns constant value, so it should be safe to replace that function invocation just with a macro that performs same calculations. For case #3: reassemble_packets() is invoked only by ixgbe_recv_scattered_burst_vec(). And in turn, ixgbe_recv_scattered_burst_vec() operates only on fixed max amount of packets per call: RTE_IXGBE_MAX_RX_BURST. So, it should be safe to replace VLA with fixed size array. Signed-off-by: Konstantin Ananyev <konstantin.ananyev@huawei.com> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com> --- drivers/net/ixgbe/ixgbe_ethdev.c | 21 +++++++++++++-------- drivers/net/ixgbe/ixgbe_rxtx_vec_common.h | 4 +++- 2 files changed, 16 insertions(+), 9 deletions(-) diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c index 8bee97d191..47b0acd7b1 100644 --- a/drivers/net/ixgbe/ixgbe_ethdev.c +++ b/drivers/net/ixgbe/ixgbe_ethdev.c @@ -3437,11 +3437,16 @@ ixgbe_dev_stats_reset(struct rte_eth_dev *dev) } /* This function calculates the number of xstats based on the current config */ + +#define IXGBE_XSTATS_CALC_NUM \ + (IXGBE_NB_HW_STATS + IXGBE_NB_MACSEC_STATS + \ + (IXGBE_NB_RXQ_PRIO_STATS * IXGBE_NB_RXQ_PRIO_VALUES) + \ + (IXGBE_NB_TXQ_PRIO_STATS * IXGBE_NB_TXQ_PRIO_VALUES)) + static unsigned -ixgbe_xstats_calc_num(void) { - return IXGBE_NB_HW_STATS + IXGBE_NB_MACSEC_STATS + - (IXGBE_NB_RXQ_PRIO_STATS * IXGBE_NB_RXQ_PRIO_VALUES) + - (IXGBE_NB_TXQ_PRIO_STATS * IXGBE_NB_TXQ_PRIO_VALUES); +ixgbe_xstats_calc_num(void) +{ + return IXGBE_XSTATS_CALC_NUM; } static int ixgbe_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev, @@ -3557,8 +3562,8 @@ static int ixgbe_dev_xstats_get_names_by_id( } uint16_t i; - uint16_t size = ixgbe_xstats_calc_num(); - struct rte_eth_xstat_name xstats_names_copy[size]; + struct rte_eth_xstat_name xstats_names_copy[IXGBE_XSTATS_CALC_NUM]; + const uint16_t size = RTE_DIM(xstats_names_copy); ixgbe_dev_xstats_get_names_by_id(dev, NULL, xstats_names_copy, size); @@ -3740,8 +3745,8 @@ ixgbe_dev_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids, } uint16_t i; - uint16_t size = ixgbe_xstats_calc_num(); - uint64_t values_copy[size]; + uint64_t values_copy[IXGBE_XSTATS_CALC_NUM]; + const uint16_t size = RTE_DIM(values_copy); ixgbe_dev_xstats_get_by_id(dev, NULL, values_copy, size); diff --git a/drivers/net/ixgbe/ixgbe_rxtx_vec_common.h b/drivers/net/ixgbe/ixgbe_rxtx_vec_common.h index a4d9ec9b08..c1cf0a581a 100644 --- a/drivers/net/ixgbe/ixgbe_rxtx_vec_common.h +++ b/drivers/net/ixgbe/ixgbe_rxtx_vec_common.h @@ -14,11 +14,13 @@ static inline uint16_t reassemble_packets(struct ixgbe_rx_queue *rxq, struct rte_mbuf **rx_bufs, uint16_t nb_bufs, uint8_t *split_flags) { - struct rte_mbuf *pkts[nb_bufs]; /*finished pkts*/ + struct rte_mbuf *pkts[RTE_IXGBE_MAX_RX_BURST]; /*finished pkts*/ struct rte_mbuf *start = rxq->pkt_first_seg; struct rte_mbuf *end = rxq->pkt_last_seg; unsigned int pkt_idx, buf_idx; + RTE_ASSERT(nb_bufs <= RTE_DIM(pkts)); + for (buf_idx = 0, pkt_idx = 0; buf_idx < nb_bufs; buf_idx++) { if (end != NULL) { /* processing a split packet */ -- 2.47.0.vfs.0.3