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,USER_AGENT_GIT autolearn=unavailable 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 5979EC433E9 for ; Fri, 19 Mar 2021 13:31:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35BCA64F4D for ; Fri, 19 Mar 2021 13:31:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230235AbhCSNam (ORCPT ); Fri, 19 Mar 2021 09:30:42 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:14020 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230250AbhCSNaT (ORCPT ); Fri, 19 Mar 2021 09:30:19 -0400 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4F24T26YgmzPkdk; Fri, 19 Mar 2021 21:27:50 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.498.0; Fri, 19 Mar 2021 21:30:07 +0800 From: John Garry To: , , , , , , CC: , , , , John Garry Subject: [PATCH 4/6] iommu: Add iommu_dma_set_opt_size() Date: Fri, 19 Mar 2021 21:25:46 +0800 Message-ID: <1616160348-29451-5-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1616160348-29451-1-git-send-email-john.garry@huawei.com> References: <1616160348-29451-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a function which allows the max optimised IOMMU DMA size to be set. Signed-off-by: John Garry --- drivers/iommu/dma-iommu.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 15b7270a5c2a..a5dfbd6c0496 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -447,6 +447,21 @@ static dma_addr_t iommu_dma_alloc_iova(struct iommu_domain *domain, return (dma_addr_t)iova << shift; } +__maybe_unused +static void iommu_dma_set_opt_size(struct device *dev, size_t size) +{ + struct iommu_domain *domain = iommu_get_dma_domain(dev); + struct iommu_dma_cookie *cookie = domain->iova_cookie; + struct iova_domain *iovad = &cookie->iovad; + unsigned long shift, iova_len; + + shift = iova_shift(iovad); + iova_len = size >> shift; + iova_len = roundup_pow_of_two(iova_len); + + iova_rcache_set_upper_limit(iovad, iova_len); +} + static void iommu_dma_free_iova(struct iommu_dma_cookie *cookie, dma_addr_t iova, size_t size, struct page *freelist) { -- 2.26.2