From patchwork Mon Apr 4 12:42:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shameerali Kolothum Thodi X-Patchwork-Id: 12800167 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 1F418C433F5 for ; Mon, 4 Apr 2022 12:43:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233970AbiDDMpn (ORCPT ); Mon, 4 Apr 2022 08:45:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347542AbiDDMpn (ORCPT ); Mon, 4 Apr 2022 08:45:43 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C5E51AF01 for ; Mon, 4 Apr 2022 05:43:47 -0700 (PDT) Received: from fraeml735-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KX9QN2d1Yz686H8; Mon, 4 Apr 2022 20:42:04 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml735-chm.china.huawei.com (10.206.15.216) 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 14:43:45 +0200 Received: from A2006125610.china.huawei.com (10.47.93.34) by lhreml710-chm.china.huawei.com (10.201.108.61) 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 13:43:37 +0100 From: Shameer Kolothum To: , , CC: , , , , , , , , , , , , Subject: [PATCH v9 05/11] iommu/dma: Introduce a helper to remove reserved regions Date: Mon, 4 Apr 2022 13:42:03 +0100 Message-ID: <20220404124209.1086-6-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20220404124209.1086-1-shameerali.kolothum.thodi@huawei.com> References: <20220404124209.1086-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.93.34] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Currently drivers use generic_iommu_put_resv_regions() to remove reserved regions. Introduce a dma-iommu specific reserve region removal helper(iommu_dma_put_resv_regions()). This will be useful when we introduce reserve regions with any firmware specific memory allocations(eg: IORT RMR) that have to be freed. Also update current users of iommu_dma_get_resv_regions() to use iommu_dma_put_resv_regions() for removal. Signed-off-by: Shameer Kolothum --- drivers/iommu/apple-dart.c | 2 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +- drivers/iommu/arm/arm-smmu/arm-smmu.c | 2 +- drivers/iommu/dma-iommu.c | 6 ++++++ drivers/iommu/virtio-iommu.c | 2 +- include/linux/dma-iommu.h | 5 +++++ 6 files changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c index decafb07ad08..6c198a08e50f 100644 --- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c @@ -771,7 +771,7 @@ static const struct iommu_ops apple_dart_iommu_ops = { .of_xlate = apple_dart_of_xlate, .def_domain_type = apple_dart_def_domain_type, .get_resv_regions = apple_dart_get_resv_regions, - .put_resv_regions = generic_iommu_put_resv_regions, + .put_resv_regions = iommu_dma_put_resv_regions, .pgsize_bitmap = -1UL, /* Restricted during dart probe */ .default_domain_ops = &(const struct iommu_domain_ops) { .attach_dev = apple_dart_attach_dev, diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 627a3ed5ee8f..efa38b4411f3 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2847,7 +2847,7 @@ static struct iommu_ops arm_smmu_ops = { .device_group = arm_smmu_device_group, .of_xlate = arm_smmu_of_xlate, .get_resv_regions = arm_smmu_get_resv_regions, - .put_resv_regions = generic_iommu_put_resv_regions, + .put_resv_regions = iommu_dma_put_resv_regions, .dev_has_feat = arm_smmu_dev_has_feature, .dev_feat_enabled = arm_smmu_dev_feature_enabled, .dev_enable_feat = arm_smmu_dev_enable_feature, diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index 568cce590ccc..9a5b785d28fd 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -1589,7 +1589,7 @@ static struct iommu_ops arm_smmu_ops = { .device_group = arm_smmu_device_group, .of_xlate = arm_smmu_of_xlate, .get_resv_regions = arm_smmu_get_resv_regions, - .put_resv_regions = generic_iommu_put_resv_regions, + .put_resv_regions = iommu_dma_put_resv_regions, .def_domain_type = arm_smmu_def_domain_type, .pgsize_bitmap = -1UL, /* Restricted during device attach */ .owner = THIS_MODULE, diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 93d76b666888..44e3f3feaab6 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -389,6 +389,12 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list) } EXPORT_SYMBOL(iommu_dma_get_resv_regions); +void iommu_dma_put_resv_regions(struct device *dev, struct list_head *list) +{ + generic_iommu_put_resv_regions(dev, list); +} +EXPORT_SYMBOL(iommu_dma_put_resv_regions); + static int cookie_init_hw_msi_region(struct iommu_dma_cookie *cookie, phys_addr_t start, phys_addr_t end) { diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c index 25be4b822aa0..b8fea7576bbd 100644 --- a/drivers/iommu/virtio-iommu.c +++ b/drivers/iommu/virtio-iommu.c @@ -1013,7 +1013,7 @@ static struct iommu_ops viommu_ops = { .release_device = viommu_release_device, .device_group = viommu_device_group, .get_resv_regions = viommu_get_resv_regions, - .put_resv_regions = generic_iommu_put_resv_regions, + .put_resv_regions = iommu_dma_put_resv_regions, .of_xlate = viommu_of_xlate, .owner = THIS_MODULE, .default_domain_ops = &(const struct iommu_domain_ops) { diff --git a/include/linux/dma-iommu.h b/include/linux/dma-iommu.h index 24607dc3c2ac..0628db1e3272 100644 --- a/include/linux/dma-iommu.h +++ b/include/linux/dma-iommu.h @@ -37,6 +37,7 @@ void iommu_dma_compose_msi_msg(struct msi_desc *desc, struct msi_msg *msg); void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list); +void iommu_dma_put_resv_regions(struct device *dev, struct list_head *list); void iommu_dma_free_cpu_cached_iovas(unsigned int cpu, struct iommu_domain *domain); @@ -89,5 +90,9 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he { } +static inline void iommu_dma_put_resv_regions(struct device *dev, struct list_head *list) +{ +} + #endif /* CONFIG_IOMMU_DMA */ #endif /* __DMA_IOMMU_H */