From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 1658DA0542; Thu, 13 Feb 2020 13:44:37 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id D4DD21BFF3; Thu, 13 Feb 2020 13:44:23 +0100 (CET) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by dpdk.org (Postfix) with ESMTP id F2B161BFE5; Thu, 13 Feb 2020 13:44:22 +0100 (CET) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 83FE41063; Thu, 13 Feb 2020 04:44:22 -0800 (PST) Received: from net-arm-thunderx2-04.shanghai.arm.com (net-arm-thunderx2-04.shanghai.arm.com [10.169.40.184]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 420A43F6CF; Thu, 13 Feb 2020 04:44:15 -0800 (PST) From: Gavin Hu To: dev@dpdk.org Cc: nd@arm.com, david.marchand@redhat.com, thomas@monjalon.net, rasland@mellanox.com, drc@linux.vnet.ibm.com, bruce.richardson@intel.com, konstantin.ananyev@intel.com, matan@mellanox.com, shahafs@mellanox.com, viacheslavo@mellanox.com, jerinj@marvell.com, Honnappa.Nagarahalli@arm.com, ruifeng.wang@arm.com, phil.yang@arm.com, joyce.kong@arm.com, steve.capper@arm.com, stable@dpdk.org Date: Thu, 13 Feb 2020 20:38:53 +0800 Message-Id: <20200213123854.203566-6-gavin.hu@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200213123854.203566-1-gavin.hu@arm.com> References: <20200213123854.203566-1-gavin.hu@arm.com> Subject: [dpdk-dev] [PATCH RFC v1 5/6] net/mlx5: non-cacheable mapping defaulted for aarch64 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" aarch64 does not map pci resources to 'write-combine' nor cacheable. In Linux Kernel arch_can_pci_mmap_wc() equals to 0 on aarch64[1]. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ tree/drivers/pci/pci-sysfs.c?h=v5.4#n1204 Fixes: f078ceb6ae93 ("net/mlx5: fix Tx doorbell write memory barrier") Cc: stable@dpdk.org Signed-off-by: Gavin Hu Reviewed-by: Phil Yang --- drivers/net/mlx5/mlx5_txq.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c index bc13abfe6..144bab4a6 100644 --- a/drivers/net/mlx5/mlx5_txq.c +++ b/drivers/net/mlx5/mlx5_txq.c @@ -319,7 +319,11 @@ txq_uar_ncattr_init(struct mlx5_txq_ctrl *txq_ctrl, size_t page_size) off_t cmd; txq_ctrl->txq.db_heu = priv->config.dbnc == MLX5_TXDB_HEURISTIC; +#ifdef RTE_ARCH_ARM64 + txq_ctrl->txq.db_nc = 1; +#else txq_ctrl->txq.db_nc = 0; +#endif /* Check the doorbell register mapping type. */ cmd = txq_ctrl->uar_mmap_offset / page_size; cmd >>= MLX5_UAR_MMAP_CMD_SHIFT; -- 2.17.1