From patchwork Sat Feb 27 18:10:23 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 8444961 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 596949F1D4 for ; Sat, 27 Feb 2016 18:11:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 52D25203E5 for ; Sat, 27 Feb 2016 18:11:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 210F3203C3 for ; Sat, 27 Feb 2016 18:11:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992535AbcB0SKv (ORCPT ); Sat, 27 Feb 2016 13:10:51 -0500 Received: from casper.infradead.org ([85.118.1.10]:60822 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756717AbcB0SKi (ORCPT ); Sat, 27 Feb 2016 13:10:38 -0500 Received: from [83.175.99.196] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.85 #2 (Red Hat Linux)) id 1aZjK9-0006w0-1G; Sat, 27 Feb 2016 18:10:37 +0000 From: Christoph Hellwig To: linux-rdma@vger.kernel.org Cc: swise@opengridcomputing.com, sagig@mellanox.com, target-devel@vger.kernel.org Subject: [PATCH 05/13] IB/core: add a simple MR pool Date: Sat, 27 Feb 2016 19:10:23 +0100 Message-Id: <1456596631-19418-6-git-send-email-hch@lst.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1456596631-19418-1-git-send-email-hch@lst.de> References: <1456596631-19418-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Christoph Hellwig --- drivers/infiniband/core/Makefile | 2 +- drivers/infiniband/core/mr_pool.c | 84 +++++++++++++++++++++++++++++++++++++++ drivers/infiniband/core/verbs.c | 5 +++ include/rdma/ib_verbs.h | 9 ++++- include/rdma/mr_pool.h | 25 ++++++++++++ 5 files changed, 123 insertions(+), 2 deletions(-) create mode 100644 drivers/infiniband/core/mr_pool.c create mode 100644 include/rdma/mr_pool.h diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile index f818538..48bd9d8 100644 --- a/drivers/infiniband/core/Makefile +++ b/drivers/infiniband/core/Makefile @@ -10,7 +10,7 @@ obj-$(CONFIG_INFINIBAND_USER_ACCESS) += ib_uverbs.o ib_ucm.o \ ib_core-y := packer.o ud_header.o verbs.o cq.o sysfs.o \ device.o fmr_pool.o cache.o netlink.o \ - roce_gid_mgmt.o + roce_gid_mgmt.o mr_pool.o ib_core-$(CONFIG_INFINIBAND_USER_MEM) += umem.o ib_core-$(CONFIG_INFINIBAND_ON_DEMAND_PAGING) += umem_odp.o umem_rbtree.o diff --git a/drivers/infiniband/core/mr_pool.c b/drivers/infiniband/core/mr_pool.c new file mode 100644 index 0000000..b1eb27a --- /dev/null +++ b/drivers/infiniband/core/mr_pool.c @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2016 HGST, a Western Digital Company. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ +#include +#include + +struct ib_mr *ib_mr_pool_get(struct ib_qp *qp, struct list_head *list) +{ + struct ib_mr *mr = NULL; + unsigned long flags; + + spin_lock_irqsave(&qp->mr_lock, flags); + mr = list_first_entry_or_null(list, struct ib_mr, qp_entry); + if (mr) + qp->mrs_used++; + spin_unlock_irqrestore(&qp->mr_lock, flags); + + return mr; +} +EXPORT_SYMBOL(ib_mr_pool_get); + +void ib_mr_pool_put(struct ib_qp *qp, struct list_head *list, struct ib_mr *mr) +{ + unsigned long flags; + + spin_lock_irqsave(&qp->mr_lock, flags); + list_add(&mr->qp_entry, list); + qp->mrs_used--; + spin_unlock_irqrestore(&qp->mr_lock, flags); +} +EXPORT_SYMBOL(ib_mr_pool_put); + +int ib_mr_pool_init(struct ib_qp *qp, struct list_head *list, int nr, + enum ib_mr_type type, u32 max_num_sg) +{ + struct ib_mr *mr; + unsigned long flags; + int ret, i; + + for (i = 0; i < nr; i++) { + mr = ib_alloc_mr(qp->pd, type, max_num_sg); + if (IS_ERR(mr)) { + ret = PTR_ERR(mr); + goto out; + } + + spin_lock_irqsave(&qp->mr_lock, flags); + list_add_tail(&mr->qp_entry, list); + spin_unlock_irqrestore(&qp->mr_lock, flags); + } + + return 0; +out: + ib_mr_pool_destroy(qp, list); + return ret; +} +EXPORT_SYMBOL(ib_mr_pool_init); + +void ib_mr_pool_destroy(struct ib_qp *qp, struct list_head *list) +{ + struct ib_mr *mr; + unsigned long flags; + + spin_lock_irqsave(&qp->mr_lock, flags); + while (!list_empty(list)) { + mr = list_first_entry(list, struct ib_mr, qp_entry); + list_del(&mr->qp_entry); + + spin_unlock_irqrestore(&qp->mr_lock, flags); + ib_dereg_mr(mr); + spin_lock_irqsave(&qp->mr_lock, flags); + } + spin_unlock_irqrestore(&qp->mr_lock, flags); +} +EXPORT_SYMBOL(ib_mr_pool_destroy); diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 61131f8..9a77bb8 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -762,6 +762,9 @@ struct ib_qp *ib_create_qp(struct ib_pd *pd, qp->qp_type = qp_init_attr->qp_type; atomic_set(&qp->usecnt, 0); + qp->mrs_used = 0; + spin_lock_init(&qp->mr_lock); + if (qp_init_attr->qp_type == IB_QPT_XRC_TGT) return ib_create_xrc_qp(qp, qp_init_attr); @@ -1255,6 +1258,8 @@ int ib_destroy_qp(struct ib_qp *qp) struct ib_srq *srq; int ret; + WARN_ON_ONCE(qp->mrs_used > 0); + if (atomic_read(&qp->usecnt)) return -EBUSY; diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 267f11e..1e68dae 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1408,6 +1408,10 @@ struct ib_qp { struct ib_srq *srq; struct ib_xrcd *xrcd; /* XRC TGT QPs only */ struct list_head xrcd_list; + + spinlock_t mr_lock; + int mrs_used; + /* count times opened, mcast attaches, flow attaches */ atomic_t usecnt; struct list_head open_list; @@ -1422,12 +1426,15 @@ struct ib_qp { struct ib_mr { struct ib_device *device; struct ib_pd *pd; - struct ib_uobject *uobject; u32 lkey; u32 rkey; u64 iova; u32 length; unsigned int page_size; + union { + struct ib_uobject *uobject; /* user */ + struct list_head qp_entry; /* FR */ + }; }; struct ib_mw { diff --git a/include/rdma/mr_pool.h b/include/rdma/mr_pool.h new file mode 100644 index 0000000..986010b --- /dev/null +++ b/include/rdma/mr_pool.h @@ -0,0 +1,25 @@ +/* + * Copyright (c) 2016 HGST, a Western Digital Company. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ +#ifndef _RDMA_MR_POOL_H +#define _RDMA_MR_POOL_H 1 + +#include + +struct ib_mr *ib_mr_pool_get(struct ib_qp *qp, struct list_head *list); +void ib_mr_pool_put(struct ib_qp *qp, struct list_head *list, struct ib_mr *mr); + +int ib_mr_pool_init(struct ib_qp *qp, struct list_head *list, int nr, + enum ib_mr_type type, u32 max_num_sg); +void ib_mr_pool_destroy(struct ib_qp *qp, struct list_head *list); + +#endif /* _RDMA_MR_POOL_H */