From patchwork Thu Aug 1 12:21:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhen Lei X-Patchwork-Id: 11070623 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BBE1513AC for ; Thu, 1 Aug 2019 12:22:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ABE7B26B39 for ; Thu, 1 Aug 2019 12:22:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A04B028560; Thu, 1 Aug 2019 12:22:34 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 53B9E26B39 for ; Thu, 1 Aug 2019 12:22:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=yL3MTijBsOgeez5LEB8ELXSCW75EiHMxoUD8rLOXx4A=; b=L/CPYIwTH2PJSi HjF1rYrjWfvKa+Hk1e9vrHDccEwp0FqDlOcdcK5UrBCe0DbLt09FNBhGhH8zKKGicLSYmd+P0/qXi 1k7MXnvVYV1K7u3wXinSF21aPA968PNIcQkDNPcSekMUUZTrB1Mk5cGrNW8Gpuqm+y6aZkcwaDKjt cAtYOzhVhN59II5VcA6HGnLf3/o7A7Pn3c0VxcgmbmrsJejm/LP9GyVe8zoYaVHEuwji4SyndafjJ eh5D0nZKyhdnip7E3UtpzNJFQTpddBAdAXHqlsd/OInxsKMvfv4nzeZXnf5NfIYVOYaO0jZPBHA0l 52/jLpB5qbIrxoRfBabQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1htA6L-0000qC-8i; Thu, 01 Aug 2019 12:22:33 +0000 Received: from szxga04-in.huawei.com ([45.249.212.190] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1htA6I-0000p4-FP for linux-arm-kernel@lists.infradead.org; Thu, 01 Aug 2019 12:22:31 +0000 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 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 X-Originating-IP: [10.133.215.186] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190801_052230_671859_9F136942 X-CRM114-Status: UNSURE ( 9.98 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zhen Lei Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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)