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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BC639C433F5 for ; Mon, 4 Apr 2022 11:33:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359792AbiDDLf1 (ORCPT ); Mon, 4 Apr 2022 07:35:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376275AbiDDLfO (ORCPT ); Mon, 4 Apr 2022 07:35:14 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 858E53D1FA for ; Mon, 4 Apr 2022 04:33:17 -0700 (PDT) Received: from fraeml745-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KX7qh0hzfz67tf3; Mon, 4 Apr 2022 19:30:24 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml745-chm.china.huawei.com (10.206.15.226) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 4 Apr 2022 13:33:15 +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 15.1.2375.24; Mon, 4 Apr 2022 12:33:11 +0100 From: John Garry To: , , CC: , , , , , , , , , John Garry Subject: [PATCH RESEND v5 5/5] iova: Add iova_len argument to iova_domain_init_rcaches() Date: Mon, 4 Apr 2022 19:27:14 +0800 Message-ID: <1649071634-188535-6-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1649071634-188535-1-git-send-email-john.garry@huawei.com> References: <1649071634-188535-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) 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 Add max opt argument to iova_domain_init_rcaches(), and use it to set the rcaches range. Also fix up all users to set this value (at 0, meaning use default), including a wrapper for that, iova_domain_init_rcaches_default(). For dma-iommu.c we derive the iova_len argument from the IOMMU group max opt DMA size. Signed-off-by: John Garry --- drivers/iommu/dma-iommu.c | 15 ++++++++++++++- drivers/iommu/iova.c | 19 ++++++++++++++++--- drivers/vdpa/vdpa_user/iova_domain.c | 4 ++-- include/linux/iova.h | 3 ++- 4 files changed, 34 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 42ca42ff1b5d..19f35624611c 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -525,6 +525,8 @@ 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; int ret; if (!cookie || cookie->type != IOMMU_DMA_IOVA_COOKIE) @@ -560,7 +562,18 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, } init_iova_domain(iovad, 1UL << order, base_pfn); - ret = iova_domain_init_rcaches(iovad); + + 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 = roundup_pow_of_two(max_opt_dma_size); + iova_len >>= shift; + if (!iova_len) + iova_len = 1; + } + + ret = iova_domain_init_rcaches(iovad, iova_len); if (ret) return ret; diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c index 5c22b9187b79..d65e79e132ee 100644 --- a/drivers/iommu/iova.c +++ b/drivers/iommu/iova.c @@ -706,12 +706,20 @@ static void iova_magazine_push(struct iova_magazine *mag, unsigned long pfn) mag->pfns[mag->size++] = pfn; } -int iova_domain_init_rcaches(struct iova_domain *iovad) +static unsigned long iova_len_to_rcache_max(unsigned long iova_len) +{ + return order_base_2(iova_len) + 1; +} + +int iova_domain_init_rcaches(struct iova_domain *iovad, unsigned long iova_len) { unsigned int cpu; int i, ret; - iovad->rcache_max_size = 6; /* Arbitrarily high default */ + if (iova_len) + iovad->rcache_max_size = iova_len_to_rcache_max(iova_len); + else + iovad->rcache_max_size = 6; /* Arbitrarily high default */ iovad->rcaches = kcalloc(iovad->rcache_max_size, sizeof(struct iova_rcache), @@ -755,7 +763,12 @@ int iova_domain_init_rcaches(struct iova_domain *iovad) free_iova_rcaches(iovad); return ret; } -EXPORT_SYMBOL_GPL(iova_domain_init_rcaches); + +int iova_domain_init_rcaches_default(struct iova_domain *iovad) +{ + return iova_domain_init_rcaches(iovad, 0); +} +EXPORT_SYMBOL_GPL(iova_domain_init_rcaches_default); /* * Try inserting IOVA range starting with 'iova_pfn' into 'rcache', and diff --git a/drivers/vdpa/vdpa_user/iova_domain.c b/drivers/vdpa/vdpa_user/iova_domain.c index 6daa3978d290..3a2acef98a4a 100644 --- a/drivers/vdpa/vdpa_user/iova_domain.c +++ b/drivers/vdpa/vdpa_user/iova_domain.c @@ -514,12 +514,12 @@ vduse_domain_create(unsigned long iova_limit, size_t bounce_size) spin_lock_init(&domain->iotlb_lock); init_iova_domain(&domain->stream_iovad, PAGE_SIZE, IOVA_START_PFN); - ret = iova_domain_init_rcaches(&domain->stream_iovad); + ret = iova_domain_init_rcaches_default(&domain->stream_iovad); if (ret) goto err_iovad_stream; init_iova_domain(&domain->consistent_iovad, PAGE_SIZE, bounce_pfns); - ret = iova_domain_init_rcaches(&domain->consistent_iovad); + ret = iova_domain_init_rcaches_default(&domain->consistent_iovad); if (ret) goto err_iovad_consistent; diff --git a/include/linux/iova.h b/include/linux/iova.h index 02f7222fa85a..56281434ce0c 100644 --- a/include/linux/iova.h +++ b/include/linux/iova.h @@ -95,7 +95,8 @@ struct iova *reserve_iova(struct iova_domain *iovad, unsigned long pfn_lo, unsigned long pfn_hi); void init_iova_domain(struct iova_domain *iovad, unsigned long granule, unsigned long start_pfn); -int iova_domain_init_rcaches(struct iova_domain *iovad); +int iova_domain_init_rcaches(struct iova_domain *iovad, unsigned long iova_len); +int iova_domain_init_rcaches_default(struct iova_domain *iovad); struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn); void put_iova_domain(struct iova_domain *iovad); #else -- 2.26.2