From patchwork Wed Aug 24 09:42:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cheng Xu X-Patchwork-Id: 12953127 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0F1C8C32793 for ; Wed, 24 Aug 2022 09:43:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235675AbiHXJm6 (ORCPT ); Wed, 24 Aug 2022 05:42:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236160AbiHXJm5 (ORCPT ); Wed, 24 Aug 2022 05:42:57 -0400 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 283713A4B1 for ; Wed, 24 Aug 2022 02:42:55 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R581e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045176;MF=chengyou@linux.alibaba.com;NM=1;PH=DS;RN=4;SR=0;TI=SMTPD_---0VN7.kRb_1661334173; Received: from localhost(mailfrom:chengyou@linux.alibaba.com fp:SMTPD_---0VN7.kRb_1661334173) by smtp.aliyun-inc.com; Wed, 24 Aug 2022 17:42:53 +0800 From: Cheng Xu To: jgg@ziepe.ca, leon@kernel.org Cc: linux-rdma@vger.kernel.org, KaiShen@linux.alibaba.com Subject: [PATCH for-next 2/2] RDMA/erdma: Add drain_sq and drain_rq support Date: Wed, 24 Aug 2022 17:42:51 +0800 Message-Id: <20220824094251.23190-3-chengyou@linux.alibaba.com> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220824094251.23190-1-chengyou@linux.alibaba.com> References: <20220824094251.23190-1-chengyou@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org For erdma, hardware won't process any WRs after modifying QP state to error, so the default __ib_drain_sq and __ib_drain_rq can not work for erdma device. Here, we introduce custom implementation of drain_sq and drain_rq interface to fit erdma hardware. Signed-off-by: Cheng Xu Reviewed-by: Leon Romanovsky --- drivers/infiniband/hw/erdma/erdma_qp.c | 71 +++++++++++++++++++++++ drivers/infiniband/hw/erdma/erdma_verbs.h | 10 ++++ 2 files changed, 81 insertions(+) diff --git a/drivers/infiniband/hw/erdma/erdma_qp.c b/drivers/infiniband/hw/erdma/erdma_qp.c index abf8b134d076..57fdb946fbfd 100644 --- a/drivers/infiniband/hw/erdma/erdma_qp.c +++ b/drivers/infiniband/hw/erdma/erdma_qp.c @@ -599,3 +599,74 @@ int erdma_post_recv_nodrain(struct ib_qp *ibqp, { return erdma_post_recv(ibqp, recv_wr, bad_recv_wr, false); } + +static void erdma_drain_qp_done(struct ib_cq *cq, struct ib_wc *wc) +{ + struct erdma_drain_cqe *cqe = + container_of(wc->wr_cqe, struct erdma_drain_cqe, cqe); + + complete(&cqe->done); +} + +static void erdma_drain_qp_common(struct ib_qp *ibqp, struct completion *comp, + struct ib_cq *ibcq) +{ + struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR }; + struct erdma_qp *qp = to_eqp(ibqp); + const struct ib_send_wr *bad_swr; + const struct ib_recv_wr *bad_rwr; + struct ib_rdma_wr swr = { + .wr = { + .next = NULL, + { .wr_cqe = &qp->kern_qp.sdrain.cqe, }, + .opcode = IB_WR_RDMA_WRITE, + .send_flags = IB_SEND_SIGNALED, + }, + }; + struct ib_recv_wr rwr = { + .next = NULL, + .wr_cqe = &qp->kern_qp.rdrain.cqe, + .num_sge = 0, + }; + + if (qp->flags & ERDMA_QP_FLAGS_DRAIN_ISSUED) + goto wait_for_completion; + + qp->flags |= ERDMA_QP_FLAGS_DRAIN_ISSUED; + + qp->kern_qp.rdrain.cqe.done = erdma_drain_qp_done; + init_completion(&qp->kern_qp.rdrain.done); + + qp->kern_qp.sdrain.cqe.done = erdma_drain_qp_done; + init_completion(&qp->kern_qp.sdrain.done); + + if (erdma_post_recv(ibqp, &rwr, &bad_rwr, true)) + return; + + if (erdma_post_send(ibqp, &swr.wr, &bad_swr, true)) + return; + + if (ib_modify_qp(ibqp, &attr, IB_QP_STATE)) + return; + +wait_for_completion: + if (ibcq->poll_ctx == IB_POLL_DIRECT) + while (wait_for_completion_timeout(comp, HZ / 10) <= 0) + ib_process_cq_direct(ibcq, -1); + else + wait_for_completion(comp); +} + +void erdma_drain_sq(struct ib_qp *ibqp) +{ + struct erdma_qp *qp = to_eqp(ibqp); + + erdma_drain_qp_common(ibqp, &qp->kern_qp.sdrain.done, ibqp->send_cq); +} + +void erdma_drain_rq(struct ib_qp *ibqp) +{ + struct erdma_qp *qp = to_eqp(ibqp); + + erdma_drain_qp_common(ibqp, &qp->kern_qp.rdrain.done, ibqp->recv_cq); +} diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.h b/drivers/infiniband/hw/erdma/erdma_verbs.h index f4148fbac878..4cec92c8a737 100644 --- a/drivers/infiniband/hw/erdma/erdma_verbs.h +++ b/drivers/infiniband/hw/erdma/erdma_verbs.h @@ -133,6 +133,11 @@ struct erdma_uqp { u32 rq_offset; }; +struct erdma_drain_cqe { + struct ib_cqe cqe; + struct completion done; +}; + struct erdma_kqp { u16 sq_pi; u16 sq_ci; @@ -155,6 +160,9 @@ struct erdma_kqp { void *sq_db_info; void *rq_db_info; + struct erdma_drain_cqe sdrain; + struct erdma_drain_cqe rdrain; + u8 sig_all; }; @@ -341,6 +349,8 @@ int erdma_post_send_nodrain(struct ib_qp *ibqp, int erdma_post_recv_nodrain(struct ib_qp *ibqp, const struct ib_recv_wr *recv_wr, const struct ib_recv_wr **bad_recv_wr); +void erdma_drain_sq(struct ib_qp *ibqp); +void erdma_drain_rq(struct ib_qp *ibqp); int erdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc); struct ib_mr *erdma_ib_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, u32 max_num_sg);