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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 36757C11F66 for ; Wed, 14 Jul 2021 10:42:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23EF761260 for ; Wed, 14 Jul 2021 10:42:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239211AbhGNKpK (ORCPT ); Wed, 14 Jul 2021 06:45:10 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]:3399 "EHLO frasgout.his.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232171AbhGNKpJ (ORCPT ); Wed, 14 Jul 2021 06:45:09 -0400 Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4GPv4C3mznz6FCyp; Wed, 14 Jul 2021 18:33:47 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 14 Jul 2021 12:42:17 +0200 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Wed, 14 Jul 2021 11:42:12 +0100 From: John Garry To: , , , CC: , , , , , , , , , , , , , , , , John Garry Subject: [PATCH v4 6/6] dma-iommu: Pass iova len for IOVA domain init Date: Wed, 14 Jul 2021 18:36:43 +0800 Message-ID: <1626259003-201303-7-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1626259003-201303-1-git-send-email-john.garry@huawei.com> References: <1626259003-201303-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Pass the max opt iova len to init the IOVA domain, if set. Signed-off-by: John Garry --- drivers/iommu/dma-iommu.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index b540b586fe37..eee9f5f87935 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -335,6 +335,8 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, struct iommu_dma_cookie *cookie = domain->iova_cookie; unsigned long order, base_pfn; struct iova_domain *iovad; + size_t max_opt_dma_size; + unsigned long iova_len = 0; if (!cookie || cookie->type != IOMMU_DMA_IOVA_COOKIE) return -EINVAL; @@ -368,7 +370,16 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, return 0; } - init_iova_domain(iovad, 1UL << order, base_pfn, 0); + + max_opt_dma_size = iommu_group_get_max_opt_dma_size(dev->iommu_group); + if (max_opt_dma_size) { + unsigned long shift = __ffs(1UL << order); + + iova_len = max_opt_dma_size >> shift; + iova_len = roundup_pow_of_two(iova_len); + } + + init_iova_domain(iovad, 1UL << order, base_pfn, iova_len); if (!cookie->fq_domain && (!dev || !dev_is_untrusted(dev)) && domain->ops->flush_iotlb_all && !iommu_get_dma_strict(domain)) { -- 2.26.2