From patchwork Sat Jan 23 09:43:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weihang Li X-Patchwork-Id: 12041319 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A8E5C433E0 for ; Sat, 23 Jan 2021 09:46:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5252323433 for ; Sat, 23 Jan 2021 09:46:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726863AbhAWJqv (ORCPT ); Sat, 23 Jan 2021 04:46:51 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:11141 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726779AbhAWJqu (ORCPT ); Sat, 23 Jan 2021 04:46:50 -0500 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4DNB6S1VqBz15wQB; Sat, 23 Jan 2021 17:44:16 +0800 (CST) Received: from localhost.localdomain (10.67.165.24) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.498.0; Sat, 23 Jan 2021 17:45:21 +0800 From: Weihang Li To: , CC: , , Subject: [PATCH v2 RFC 0/7] RDMA/hns: Add support for Dynamic Context Attachment Date: Sat, 23 Jan 2021 17:43:07 +0800 Message-ID: <1611394994-50363-1-git-send-email-liweihang@huawei.com> X-Mailer: git-send-email 2.8.1 MIME-Version: 1.0 X-Originating-IP: [10.67.165.24] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org The hip09 introduces the DCA(Dynamic Context Attachment) feature which supports many RC QPs to share the WQE buffer in a memory pool. If a QP enables DCA feature, the WQE's buffer will not be allocated when creating but when the users start to post WRs. This will reduce the memory consumption when there are too many QPs are inactive. Changes since v1: * Replace all GFP_ATOMIC with GFP_NOWAIT, because the former may use emergency pool if no regular memory can be found. * Change size of cap_flags of alloc_ucontext_resp from 32 to 64 to avoid a potential problem when pass it back to the userspace. * Move definition of HNS_ROCE_CAP_FLAG_DCA_MODE to hns-abi.h. * Rename free_mem_states() to free_dca_states() in #1. * Link: https://patchwork.kernel.org/project/linux-rdma/cover/1610706138-4219-1-git-send-email-liweihang@huawei.com/ Xi Wang (7): RDMA/hns: Introduce DCA for RC QP RDMA/hns: Add method for shrinking DCA memory pool RDMA/hns: Configure DCA mode for the userspace QP RDMA/hns: Add method for attaching WQE buffer RDMA/hns: Setup the configuration of WQE addressing to QPC RDMA/hns: Add method to detach WQE buffer RDMA/hns: Add method to query WQE buffer's address drivers/infiniband/hw/hns/Makefile | 2 +- drivers/infiniband/hw/hns/hns_roce_dca.c | 1264 +++++++++++++++++++++++++++ drivers/infiniband/hw/hns/hns_roce_dca.h | 68 ++ drivers/infiniband/hw/hns/hns_roce_device.h | 31 + drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 223 ++++- drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 3 + drivers/infiniband/hw/hns/hns_roce_main.c | 27 +- drivers/infiniband/hw/hns/hns_roce_qp.c | 119 ++- include/uapi/rdma/hns-abi.h | 64 ++ 9 files changed, 1754 insertions(+), 47 deletions(-) create mode 100644 drivers/infiniband/hw/hns/hns_roce_dca.c create mode 100644 drivers/infiniband/hw/hns/hns_roce_dca.h