From mboxrd@z Thu Jan 1 00:00:00 1970 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 D2FF5C61DA4 for ; Wed, 15 Mar 2023 08:17:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231754AbjCOIRQ (ORCPT ); Wed, 15 Mar 2023 04:17:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231757AbjCOIRN (ORCPT ); Wed, 15 Mar 2023 04:17:13 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D945D6A06C for ; Wed, 15 Mar 2023 01:17:09 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id v21so9083183ple.9 for ; Wed, 15 Mar 2023 01:17:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1678868229; h=message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=0mLaQ1vh45UIdLcyJqbOReYerT+bdgydOGQqjH8kflY=; b=QgvPVY+v2IF16PeFfVFPoFS14p2h1++QhEevjBzxixJST8rfXJLaG6rGQKM+70H4y2 AJL/uDarerK53+gKZpiUR6N2W7H/DzLbCLrL3ogR9SYefuX7wvexClwf/z2opnv/bp3Y jSci2/Ts5xabnEIdThqlf4vJ6zTBV+iiLOWMY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678868229; h=message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0mLaQ1vh45UIdLcyJqbOReYerT+bdgydOGQqjH8kflY=; b=Nk/7DB9rPTeFpuCxOKhXdWS4sDvfMjGLmpHIh2a4Ny8opisxPwwre3Wzuc4lRbgRWO 8YFoR8eswio0go53AvBGVB5502wmXc39iigtn/X36cksyj2/rd9+hAHd79I0/8lE2phO idFKSaw+JDUhcCrOZm1QDIVPF45Arnje1DWFOYcHZ0vt8k0J2ZUY9BD30fmwCyD6WXYI rPQuoi1wZ+bj0DXS7Uvfi8F4b+MhaqnHbwZwwm9psfYOafyhVZf63UukPaPkSMiWVWJz 2fySoH7YCbec4LiaIcwAX3ybFY3Si90u9YLVt7iS2ljNHaWGSol92nErUyb0uPqFUKnj z4wQ== X-Gm-Message-State: AO0yUKW4UVwrFlyN7+fPddEV+bKYWsg04lsUMF7pt9/AHLKvps492bnJ qcxkzcJ/2OClyzVHSeAbrV4RqBHdXSvX8vI3I0w= X-Google-Smtp-Source: AK7set+JzIH3/JP16ZAR5cnqmmaBoavKu//9jd/yay7d/cUm1Q8JblwOiqG7Z9L9Ew29t3BITkKoVA== X-Received: by 2002:a05:6a20:8e02:b0:ce:ca9:ab56 with SMTP id y2-20020a056a208e0200b000ce0ca9ab56mr51445512pzj.34.1678868228951; Wed, 15 Mar 2023 01:17:08 -0700 (PDT) Received: from dhcp-10-192-206-197.iig.avagotech.net.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id g24-20020aa78198000000b0058b927b9653sm2985706pfi.92.2023.03.15.01.17.06 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 15 Mar 2023 01:17:08 -0700 (PDT) From: Selvin Xavier To: leon@kernel.org, jgg@ziepe.ca Cc: linux-rdma@vger.kernel.org, Selvin Xavier Subject: [PATCH for-next] RDMA/bnxt_re: Add resize_cq support Date: Wed, 15 Mar 2023 01:16:55 -0700 Message-Id: <1678868215-23626-1-git-send-email-selvin.xavier@broadcom.com> X-Mailer: git-send-email 2.5.5 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000007074e905f6ebf878" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org --0000000000007074e905f6ebf878 Add resize_cq verb support for user space CQs. Resize operation for kernel CQs are not supported now. Driver should free the current CQ only after user library polls for all the completions and switch to new CQ. So after the resize_cq is returned from the driver, user libray polls for existing completions and store it as temporary data. Once library reaps all completions in the current CQ, it invokes the ibv_cmd_poll_cq to inform the driver about the resize_cq completion. Adding a check for user CQs in driver's poll_cq and complete the resize operation for user CQs. Updating uverbs_cmd_mask with poll_cq to support this. User library changes are available in this pull request. https://github.com/linux-rdma/rdma-core/pull/1315 Signed-off-by: Selvin Xavier --- drivers/infiniband/hw/bnxt_re/ib_verbs.c | 109 +++++++++++++++++++++++++++++++ drivers/infiniband/hw/bnxt_re/ib_verbs.h | 3 + drivers/infiniband/hw/bnxt_re/main.c | 2 + drivers/infiniband/hw/bnxt_re/qplib_fp.c | 44 +++++++++++++ drivers/infiniband/hw/bnxt_re/qplib_fp.h | 5 ++ include/uapi/rdma/bnxt_re-abi.h | 4 ++ 6 files changed, 167 insertions(+) diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c index 989edc7..e86afec 100644 --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c @@ -2912,6 +2912,106 @@ int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, return rc; } +static void bnxt_re_resize_cq_complete(struct bnxt_re_cq *cq) +{ + struct bnxt_re_dev *rdev = cq->rdev; + + bnxt_qplib_resize_cq_complete(&rdev->qplib_res, &cq->qplib_cq); + + cq->qplib_cq.max_wqe = cq->resize_cqe; + if (cq->resize_umem) { + ib_umem_release(cq->umem); + cq->umem = cq->resize_umem; + cq->resize_umem = NULL; + cq->resize_cqe = 0; + } +} + +int bnxt_re_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata) +{ + struct bnxt_qplib_sg_info sg_info = {}; + struct bnxt_qplib_dpi *orig_dpi = NULL; + struct bnxt_qplib_dev_attr *dev_attr; + struct bnxt_re_ucontext *uctx = NULL; + struct bnxt_re_resize_cq_req req; + struct bnxt_re_dev *rdev; + struct bnxt_re_cq *cq; + int rc, entries; + + cq = container_of(ibcq, struct bnxt_re_cq, ib_cq); + rdev = cq->rdev; + dev_attr = &rdev->dev_attr; + if (!ibcq->uobject) { + ibdev_err(&rdev->ibdev, "Kernel CQ Resize not supported"); + return -EOPNOTSUPP; + } + + if (cq->resize_umem) { + ibdev_err(&rdev->ibdev, "Resize CQ %#x failed - Busy", + cq->qplib_cq.id); + return -EBUSY; + } + + /* Check the requested cq depth out of supported depth */ + if (cqe < 1 || cqe > dev_attr->max_cq_wqes) { + ibdev_err(&rdev->ibdev, "Resize CQ %#x failed - out of range cqe %d", + cq->qplib_cq.id, cqe); + return -EINVAL; + } + + entries = roundup_pow_of_two(cqe + 1); + if (entries > dev_attr->max_cq_wqes + 1) + entries = dev_attr->max_cq_wqes + 1; + + uctx = rdma_udata_to_drv_context(udata, struct bnxt_re_ucontext, + ib_uctx); + /* uverbs consumer */ + if (ib_copy_from_udata(&req, udata, sizeof(req))) { + rc = -EFAULT; + goto fail; + } + + cq->resize_umem = ib_umem_get(&rdev->ibdev, req.cq_va, + entries * sizeof(struct cq_base), + IB_ACCESS_LOCAL_WRITE); + if (IS_ERR(cq->resize_umem)) { + rc = PTR_ERR(cq->resize_umem); + cq->resize_umem = NULL; + ibdev_err(&rdev->ibdev, "%s: ib_umem_get failed! rc = %d\n", + __func__, rc); + goto fail; + } + cq->resize_cqe = entries; + memcpy(&sg_info, &cq->qplib_cq.sg_info, sizeof(sg_info)); + orig_dpi = cq->qplib_cq.dpi; + + cq->qplib_cq.sg_info.umem = cq->resize_umem; + cq->qplib_cq.sg_info.pgsize = PAGE_SIZE; + cq->qplib_cq.sg_info.pgshft = PAGE_SHIFT; + cq->qplib_cq.dpi = &uctx->dpi; + + rc = bnxt_qplib_resize_cq(&rdev->qplib_res, &cq->qplib_cq, entries); + if (rc) { + ibdev_err(&rdev->ibdev, "Resize HW CQ %#x failed!", + cq->qplib_cq.id); + goto fail; + } + + cq->ib_cq.cqe = cq->resize_cqe; + + return 0; + +fail: + if (cq->resize_umem) { + ib_umem_release(cq->resize_umem); + cq->resize_umem = NULL; + cq->resize_cqe = 0; + memcpy(&cq->qplib_cq.sg_info, &sg_info, sizeof(sg_info)); + cq->qplib_cq.dpi = orig_dpi; + } + return rc; +} + static u8 __req_to_ib_wc_status(u8 qstatus) { switch (qstatus) { @@ -3425,6 +3525,15 @@ int bnxt_re_poll_cq(struct ib_cq *ib_cq, int num_entries, struct ib_wc *wc) struct bnxt_re_sqp_entries *sqp_entry = NULL; unsigned long flags; + /* User CQ; the only processing we do is to + * complete any pending CQ resize operation. + */ + if (cq->umem) { + if (cq->resize_umem) + bnxt_re_resize_cq_complete(cq); + return 0; + } + spin_lock_irqsave(&cq->cq_lock, flags); budget = min_t(u32, num_entries, cq->max_cql); num_entries = budget; diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.h b/drivers/infiniband/hw/bnxt_re/ib_verbs.h index 9432626..31f7e34 100644 --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.h +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.h @@ -104,6 +104,8 @@ struct bnxt_re_cq { #define MAX_CQL_PER_POLL 1024 u32 max_cql; struct ib_umem *umem; + struct ib_umem *resize_umem; + int resize_cqe; }; struct bnxt_re_mr { @@ -191,6 +193,7 @@ int bnxt_re_post_recv(struct ib_qp *qp, const struct ib_recv_wr *recv_wr, const struct ib_recv_wr **bad_recv_wr); int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, struct ib_udata *udata); +int bnxt_re_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata); int bnxt_re_destroy_cq(struct ib_cq *cq, struct ib_udata *udata); int bnxt_re_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc); int bnxt_re_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags); diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c index c5867e7..48bbba7 100644 --- a/drivers/infiniband/hw/bnxt_re/main.c +++ b/drivers/infiniband/hw/bnxt_re/main.c @@ -553,6 +553,7 @@ static const struct ib_device_ops bnxt_re_dev_ops = { .query_srq = bnxt_re_query_srq, .reg_user_mr = bnxt_re_reg_user_mr, .req_notify_cq = bnxt_re_req_notify_cq, + .resize_cq = bnxt_re_resize_cq, INIT_RDMA_OBJ_SIZE(ib_ah, bnxt_re_ah, ib_ah), INIT_RDMA_OBJ_SIZE(ib_cq, bnxt_re_cq, ib_cq), INIT_RDMA_OBJ_SIZE(ib_pd, bnxt_re_pd, ib_pd), @@ -584,6 +585,7 @@ static int bnxt_re_register_ib(struct bnxt_re_dev *rdev) return ret; dma_set_max_seg_size(&rdev->en_dev->pdev->dev, UINT_MAX); + ibdev->uverbs_cmd_mask |= BIT_ULL(IB_USER_VERBS_CMD_POLL_CQ); return ib_register_device(ibdev, "bnxt_re%d", &rdev->en_dev->pdev->dev); } diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c index 96e581c..1d769a3 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c @@ -2100,6 +2100,50 @@ int bnxt_qplib_create_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq) return rc; } +void bnxt_qplib_resize_cq_complete(struct bnxt_qplib_res *res, + struct bnxt_qplib_cq *cq) +{ + bnxt_qplib_free_hwq(res, &cq->hwq); + memcpy(&cq->hwq, &cq->resize_hwq, sizeof(cq->hwq)); +} + +int bnxt_qplib_resize_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq, + int new_cqes) +{ + struct bnxt_qplib_hwq_attr hwq_attr = {}; + struct bnxt_qplib_rcfw *rcfw = res->rcfw; + struct creq_resize_cq_resp resp = {}; + struct cmdq_resize_cq req = {}; + struct bnxt_qplib_pbl *pbl; + u32 pg_sz, lvl, new_sz; + u16 cmd_flags = 0; + int rc; + + RCFW_CMD_PREP(req, RESIZE_CQ, cmd_flags); + hwq_attr.sginfo = &cq->sg_info; + hwq_attr.res = res; + hwq_attr.depth = new_cqes; + hwq_attr.stride = sizeof(struct cq_base); + hwq_attr.type = HWQ_TYPE_QUEUE; + rc = bnxt_qplib_alloc_init_hwq(&cq->resize_hwq, &hwq_attr); + if (rc) + return rc; + + req.cq_cid = cpu_to_le32(cq->id); + pbl = &cq->resize_hwq.pbl[PBL_LVL_0]; + pg_sz = bnxt_qplib_base_pg_size(&cq->resize_hwq); + lvl = (cq->resize_hwq.level << CMDQ_RESIZE_CQ_LVL_SFT) & + CMDQ_RESIZE_CQ_LVL_MASK; + new_sz = (new_cqes << CMDQ_RESIZE_CQ_NEW_CQ_SIZE_SFT) & + CMDQ_RESIZE_CQ_NEW_CQ_SIZE_MASK; + req.new_cq_size_pg_size_lvl = cpu_to_le32(new_sz | pg_sz | lvl); + req.new_pbl = cpu_to_le64(pbl->pg_map_arr[0]); + + rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req, + (void *)&resp, NULL, 0); + return rc; +} + int bnxt_qplib_destroy_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq) { struct bnxt_qplib_rcfw *rcfw = res->rcfw; diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.h b/drivers/infiniband/hw/bnxt_re/qplib_fp.h index 0375019..d74d5ea 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_fp.h +++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.h @@ -400,6 +400,7 @@ struct bnxt_qplib_cq { u16 count; u16 period; struct bnxt_qplib_hwq hwq; + struct bnxt_qplib_hwq resize_hwq; u32 cnq_hw_ring_id; struct bnxt_qplib_nq *nq; bool resize_in_progress; @@ -532,6 +533,10 @@ void bnxt_qplib_post_recv_db(struct bnxt_qplib_qp *qp); int bnxt_qplib_post_recv(struct bnxt_qplib_qp *qp, struct bnxt_qplib_swqe *wqe); int bnxt_qplib_create_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq); +int bnxt_qplib_resize_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq, + int new_cqes); +void bnxt_qplib_resize_cq_complete(struct bnxt_qplib_res *res, + struct bnxt_qplib_cq *cq); int bnxt_qplib_destroy_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq); int bnxt_qplib_poll_cq(struct bnxt_qplib_cq *cq, struct bnxt_qplib_cqe *cqe, int num, struct bnxt_qplib_qp **qp); diff --git a/include/uapi/rdma/bnxt_re-abi.h b/include/uapi/rdma/bnxt_re-abi.h index b1de99b..f761e75 100644 --- a/include/uapi/rdma/bnxt_re-abi.h +++ b/include/uapi/rdma/bnxt_re-abi.h @@ -96,6 +96,10 @@ struct bnxt_re_cq_resp { __u32 rsvd; }; +struct bnxt_re_resize_cq_req { + __u64 cq_va; +}; + struct 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