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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 7045FC19759 for ; Thu, 1 Aug 2019 12:22:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4C59720665 for ; Thu, 1 Aug 2019 12:22:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731228AbfHAMWe (ORCPT ); Thu, 1 Aug 2019 08:22:34 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:3692 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728217AbfHAMWc (ORCPT ); Thu, 1 Aug 2019 08:22:32 -0400 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 00C158748E0FA7FF6A83; Thu, 1 Aug 2019 20:22:27 +0800 (CST) Received: from HGHY4L002753561.china.huawei.com (10.133.215.186) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.439.0; Thu, 1 Aug 2019 20:22:16 +0800 From: Zhen Lei To: Jean-Philippe Brucker , John Garry , Robin Murphy , Will Deacon , Joerg Roedel , linux-arm-kernel , iommu , linux-kernel CC: Zhen Lei Subject: [PATCH 1/2] iommu/iova: introduce iova_magazine_compact_pfns() Date: Thu, 1 Aug 2019 20:21:53 +0800 Message-ID: <20190801122154.18820-1-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.21.0.windows.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.133.215.186] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org iova_magazine_free_pfns() can only free the whole magazine buffer, add iova_magazine_compact_pfns() to support free part of it. Signed-off-by: Zhen Lei --- drivers/iommu/iova.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index 3e1a8a6755723a9..4b7a9efa0ef40af 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -795,18 +795,19 @@ static void iova_magazine_free(struct iova_magazine *mag) kfree(mag); } -static void -iova_magazine_free_pfns(struct iova_magazine *mag, struct iova_domain *iovad) +static void iova_magazine_compact_pfns(struct iova_magazine *mag, + struct iova_domain *iovad, + unsigned long newsize) { unsigned long flags; int i; - if (!mag) + if (!mag || mag->size <= newsize) return; spin_lock_irqsave(&iovad->iova_rbtree_lock, flags); - for (i = 0 ; i < mag->size; ++i) { + for (i = newsize; i < mag->size; ++i) { struct iova *iova = private_find_iova(iovad, mag->pfns[i]); BUG_ON(!iova); @@ -815,7 +816,13 @@ static void iova_magazine_free(struct iova_magazine *mag) spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags); - mag->size = 0; + mag->size = newsize; +} + +static void +iova_magazine_free_pfns(struct iova_magazine *mag, struct iova_domain *iovad) +{ + iova_magazine_compact_pfns(mag, iovad, 0); } static bool iova_magazine_full(struct iova_magazine *mag) -- 1.8.3