From patchwork Tue Nov 16 15:03:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenpeng Liang X-Patchwork-Id: 12622605 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD1CAC433FE for ; Tue, 16 Nov 2021 15:05:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A67461A4E for ; Tue, 16 Nov 2021 15:05:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237916AbhKPPIu (ORCPT ); Tue, 16 Nov 2021 10:08:50 -0500 Received: from szxga01-in.huawei.com ([45.249.212.187]:14752 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238101AbhKPPI1 (ORCPT ); Tue, 16 Nov 2021 10:08:27 -0500 Received: from dggemv711-chm.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Htq7B20hKzZd4Z; Tue, 16 Nov 2021 23:03:02 +0800 (CST) Received: from dggpeml500017.china.huawei.com (7.185.36.243) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Tue, 16 Nov 2021 23:05:24 +0800 Received: from localhost.localdomain (10.69.192.56) by dggpeml500017.china.huawei.com (7.185.36.243) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.15; Tue, 16 Nov 2021 23:05:24 +0800 From: Wenpeng Liang To: , CC: , Subject: [PATCH v2 rdma-core 0/2] libhns: Add support for direct wqe Date: Tue, 16 Nov 2021 23:03:14 +0800 Message-ID: <20211116150316.21925-1-liangwenpeng@huawei.com> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpeml500017.china.huawei.com (7.185.36.243) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Direct wqe is a mechanism to fill wqe directly into the hardware. In the case of light load, the wqe will be filled into pcie bar space of the hardware, this will reduce one memory access operation and therefore reduce the latency. The kernel parts is named "RDMA/hns: Support direct WQE of userspace". Changes since v1: * Changed the mapping scheme of direct wqe. * Use SIMD instructions to load and store dwqe data, and encapsulate instructions into macros. * Link: https://patchwork.kernel.org/project/linux-rdma/cover/1622194379-59868-1-git-send-email-liweihang@huawei.com/ Wenpeng Liang (1): Update kernel headers Yixing Liu (1): libhns: Add support for direct wqe kernel-headers/rdma/hns-abi.h | 2 ++ kernel-headers/rdma/rdma_netlink.h | 5 ++++ kernel-headers/rdma/rdma_user_rxe.h | 14 +++++++-- providers/hns/hns_roce_u.h | 5 +++- providers/hns/hns_roce_u_hw_v2.c | 44 +++++++++++++++++++++++------ providers/hns/hns_roce_u_hw_v2.h | 31 +++++++++++--------- providers/hns/hns_roce_u_verbs.c | 26 +++++++++++++++-- util/mmio.h | 27 +++++++++++++++++- 8 files changed, 125 insertions(+), 29 deletions(-) --- 2.33.0