From patchwork Tue Jul 21 12:36:07 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Marciniszyn, Mike" X-Patchwork-Id: 6835421 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 A4EEE9F38B for ; Tue, 21 Jul 2015 12:36:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B45FD20444 for ; Tue, 21 Jul 2015 12:36:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4CC9A20435 for ; Tue, 21 Jul 2015 12:36:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932559AbbGUMgM (ORCPT ); Tue, 21 Jul 2015 08:36:12 -0400 Received: from mga03.intel.com ([134.134.136.65]:3271 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932247AbbGUMgK (ORCPT ); Tue, 21 Jul 2015 08:36:10 -0400 Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP; 21 Jul 2015 05:36:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,516,1432623600"; d="scan'208";a="610015155" Received: from sedona.ch.intel.com ([143.182.228.65]) by orsmga003.jf.intel.com with ESMTP; 21 Jul 2015 05:36:09 -0700 Received: from phlsvsles11.ph.intel.com (phlsvsles11.ph.intel.com [10.228.195.43]) by sedona.ch.intel.com (8.13.6/8.14.3/Standard MailSET/Hub) with ESMTP id t6LCa8HG001478; Tue, 21 Jul 2015 05:36:08 -0700 Received: from phlsvslse11.ph.intel.com (localhost [127.0.0.1]) by phlsvsles11.ph.intel.com with ESMTP id t6LCa78v022134; Tue, 21 Jul 2015 08:36:07 -0400 Subject: [PATCH] IB/qib: Change lkey table allocation to support more MRs To: dledford@redhat.com From: Mike Marciniszyn Cc: linux-rdma@vger.kernel.org Date: Tue, 21 Jul 2015 08:36:07 -0400 Message-ID: <20150721123607.22112.55950.stgit@phlsvslse11.ph.intel.com> User-Agent: StGit/0.16 MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-8.1 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 The lkey table is allocated with with a get_user_pages() with an order based on a number of index bits from a module parameter. The underlying kernel code cannot allocate that many contiguous pages. There is no reason the underlying memory needs to be physically contiguous. This patch: - switches the allocation/deallocation to vmalloc/vfree - caps the number of bits to 23 to insure at least 1 generation bit o this matches the module parameter description Cc: stable@vger.kernel.org Reviewed-by: Vinit Agnihotri Signed-off-by: Mike Marciniszyn --- drivers/infiniband/hw/qib/qib_keys.c | 4 ++++ drivers/infiniband/hw/qib/qib_verbs.c | 14 ++++++++++---- drivers/infiniband/hw/qib/qib_verbs.h | 2 ++ 3 files changed, 16 insertions(+), 4 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/infiniband/hw/qib/qib_keys.c b/drivers/infiniband/hw/qib/qib_keys.c index ad843c7..5afaa21 100644 --- a/drivers/infiniband/hw/qib/qib_keys.c +++ b/drivers/infiniband/hw/qib/qib_keys.c @@ -86,6 +86,10 @@ int qib_alloc_lkey(struct qib_mregion *mr, int dma_region) * unrestricted LKEY. */ rkt->gen++; + /* + * bits are capped in qib_verbs.c to insure enough bits + * for generation number + */ mr->lkey = (r << (32 - ib_qib_lkey_table_size)) | ((((1 << (24 - ib_qib_lkey_table_size)) - 1) & rkt->gen) << 8); diff --git a/drivers/infiniband/hw/qib/qib_verbs.c b/drivers/infiniband/hw/qib/qib_verbs.c index a05d1a3..77e981a 100644 --- a/drivers/infiniband/hw/qib/qib_verbs.c +++ b/drivers/infiniband/hw/qib/qib_verbs.c @@ -40,6 +40,7 @@ #include #include #include +#include #include "qib.h" #include "qib_common.h" @@ -2109,10 +2110,16 @@ int qib_register_ib_device(struct qib_devdata *dd) * the LKEY). The remaining bits act as a generation number or tag. */ spin_lock_init(&dev->lk_table.lock); + /* insure generation is at least 4 bits see keys.c */ + if (ib_qib_lkey_table_size > MAX_LKEY_TABLE_BITS) { + qib_dev_warn(dd, "lkey bits %u too large, reduced to %u\n", + ib_qib_lkey_table_size, MAX_LKEY_TABLE_BITS); + ib_qib_lkey_table_size = MAX_LKEY_TABLE_BITS; + } dev->lk_table.max = 1 << ib_qib_lkey_table_size; lk_tab_size = dev->lk_table.max * sizeof(*dev->lk_table.table); dev->lk_table.table = (struct qib_mregion __rcu **) - __get_free_pages(GFP_KERNEL, get_order(lk_tab_size)); + vmalloc(lk_tab_size); if (dev->lk_table.table == NULL) { ret = -ENOMEM; goto err_lk; @@ -2286,7 +2293,7 @@ err_tx: sizeof(struct qib_pio_header), dev->pio_hdrs, dev->pio_hdrs_phys); err_hdrs: - free_pages((unsigned long) dev->lk_table.table, get_order(lk_tab_size)); + vfree(dev->lk_table.table); err_lk: kfree(dev->qp_table); err_qpt: @@ -2340,8 +2347,7 @@ void qib_unregister_ib_device(struct qib_devdata *dd) sizeof(struct qib_pio_header), dev->pio_hdrs, dev->pio_hdrs_phys); lk_tab_size = dev->lk_table.max * sizeof(*dev->lk_table.table); - free_pages((unsigned long) dev->lk_table.table, - get_order(lk_tab_size)); + vfree(dev->lk_table.table); kfree(dev->qp_table); } diff --git a/drivers/infiniband/hw/qib/qib_verbs.h b/drivers/infiniband/hw/qib/qib_verbs.h index 1635572..bce0fa5 100644 --- a/drivers/infiniband/hw/qib/qib_verbs.h +++ b/drivers/infiniband/hw/qib/qib_verbs.h @@ -647,6 +647,8 @@ struct qib_qpn_table { struct qpn_map map[QPNMAP_ENTRIES]; }; +#define MAX_LKEY_TABLE_BITS 23 + struct qib_lkey_table { spinlock_t lock; /* protect changes in this struct */ u32 next; /* next unused index (speeds search) */