From patchwork Fri Mar 19 13:25:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 404788 Delivered-To: patch@linaro.org Received: by 2002:a02:8562:0:0:0:0:0 with SMTP id g89csp1377467jai; Fri, 19 Mar 2021 06:31:14 -0700 (PDT) X-Google-Smtp-Source: ABdhPJz0kMnfHBAYHXtPzYmuDpylyvbHAqKCWChSy2Ad969lygBkT5nBIqElfjRg4p2lVl0nPn4v X-Received: by 2002:aa7:d347:: with SMTP id m7mr9342998edr.260.1616160674153; Fri, 19 Mar 2021 06:31:14 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1616160674; cv=none; d=google.com; s=arc-20160816; b=nXbJRnLYT+jWfUca2wzT7odBZc0mS60yqmW32sLDRHdX+v0X2wIg03eohLQm4nqtTl zRNjfMhxXZO17ROSvqMI6akpGEzW3UXdmtbUdqVls5FQ6uT6+jrnPA6vbvDAT6PINUMC bZ2lBz9GcfU2aggUjQl6EV0DFgsyq1dgHL1+Z3wqxaetyVRl/Y9E/x//LR4VZ4tOudW+ ejgYkisHV21UAfUAr8NY5LskkewLE8tMF/lUi3xAO1Ep4HthjQ3pKgMFLOyogm75UzF9 lQt2YESKA37f9DOyVWc7CKWnqtO7sNJHTdmvua9hlOW6K1bcrnTXGgUameMiXVqk2LAN hohA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:in-reply-to:message-id :date:subject:cc:to:from; bh=IJWUrN96asFGPxZD8Mi7lxGwR7hbif9mLlCzJnZ3oMQ=; b=dWbAGJtpv9lz/VvLQ/V/3W940kf6on03IY6aH8qGWckJ2w+DUWpJtWKR90cw9sJalA DSoTmiPNNhRXd4JxV+3QXNlL4CBgJEduGNXD2hhxoTou49oWEda8akF/Gx5FMYXcOP7d /cMzutrCPIV1COeLV66aZ33cs2h/oQaAz+qByZNSlCHwAq7D3RPgRU4UsLmkBl75b3iL 8Ci2wGp6Iz78cCDrSVV92gCqfRyKuizGXgI/2TuX05Ni6+ZwPGX2m/HLAvqe5GvJhN8o 2kGVQjDNHV8Vxu9qOsx52CcMTfJuHZgqdZ92DEQinxImOwcGX+esbyl0aBson+m+fn5x Jkug== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-scsi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-scsi-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=huawei.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id m21si4292630ejx.725.2021.03.19.06.31.14 for ; Fri, 19 Mar 2021 06:31:14 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-scsi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-scsi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-scsi-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230231AbhCSNal (ORCPT ); Fri, 19 Mar 2021 09:30:41 -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 X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@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(+) -- 2.26.2 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) {