From patchwork Wed Apr 20 16:48:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Shameerali Kolothum Thodi X-Patchwork-Id: 12820588 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 78E89C433F5 for ; Wed, 20 Apr 2022 16:50:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355921AbiDTQwt (ORCPT ); Wed, 20 Apr 2022 12:52:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1380777AbiDTQwr (ORCPT ); Wed, 20 Apr 2022 12:52:47 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6503E13EB5 for ; Wed, 20 Apr 2022 09:49:52 -0700 (PDT) Received: from fraeml709-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Kk6673Bvvz67Nln; Thu, 21 Apr 2022 00:47:27 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml709-chm.china.huawei.com (10.206.15.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 20 Apr 2022 18:49:50 +0200 Received: from A2006125610.china.huawei.com (10.47.81.194) 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; Wed, 20 Apr 2022 17:49:41 +0100 From: Shameer Kolothum To: , , CC: , , , , , , , , , , , , Subject: [PATCH v10 3/9] ACPI/IORT: Provide a generic helper to retrieve reserve regions Date: Wed, 20 Apr 2022 17:48:30 +0100 Message-ID: <20220420164836.1181-4-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20220420164836.1181-1-shameerali.kolothum.thodi@huawei.com> References: <20220420164836.1181-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.81.194] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) 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 IORT provides a helper to retrieve HW MSI reserve regions. Change this to a generic helper to retrieve any IORT related reserve regions. This will be useful when we add support for RMR nodes in subsequent patches. [Lorenzo: For ACPI IORT] Reviewed-by: Lorenzo Pieralisi Tested-by: Steven Price Tested-by: Laurentiu Tudor Signed-off-by: Shameer Kolothum Reviewed-by: Christoph Hellwig --- drivers/acpi/arm64/iort.c | 22 +++++++++++++++------- drivers/iommu/dma-iommu.c | 2 +- include/linux/acpi_iort.h | 4 ++-- 3 files changed, 18 insertions(+), 10 deletions(-) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 213f61cae176..cd5d1d7823cb 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -806,15 +806,13 @@ static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev) return NULL; } -/** - * iort_iommu_msi_get_resv_regions - Reserved region driver helper - * @dev: Device from iommu_get_resv_regions() - * @head: Reserved region list from iommu_get_resv_regions() - * +/* + * Retrieve platform specific HW MSI reserve regions. * The ITS interrupt translation spaces (ITS_base + SZ_64K, SZ_64K) * associated with the device are the HW MSI reserved regions. */ -void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) +static void iort_iommu_msi_get_resv_regions(struct device *dev, + struct list_head *head) { struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct acpi_iort_its_group *its; @@ -863,6 +861,16 @@ void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) } } +/** + * iort_iommu_get_resv_regions - Generic helper to retrieve reserved regions. + * @dev: Device from iommu_get_resv_regions() + * @head: Reserved region list from iommu_get_resv_regions() + */ +void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head) +{ + iort_iommu_msi_get_resv_regions(dev, head); +} + static inline bool iort_iommu_driver_enabled(u8 type) { switch (type) { @@ -1027,7 +1035,7 @@ int iort_iommu_configure_id(struct device *dev, const u32 *id_in) } #else -void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) +void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head) { } int iort_iommu_configure_id(struct device *dev, const u32 *input_id) { return -ENODEV; } diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 09f6e1c0f9c0..93d76b666888 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -384,7 +384,7 @@ void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list) { if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode)) - iort_iommu_msi_get_resv_regions(dev, list); + iort_iommu_get_resv_regions(dev, list); } EXPORT_SYMBOL(iommu_dma_get_resv_regions); diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index a8198b83753d..e5d2de9caf7f 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -36,7 +36,7 @@ int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); /* IOMMU interface */ int iort_dma_get_ranges(struct device *dev, u64 *size); int iort_iommu_configure_id(struct device *dev, const u32 *id_in); -void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head); +void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head); phys_addr_t acpi_iort_dma_get_max_cpu_address(void); #else static inline void acpi_iort_init(void) { } @@ -52,7 +52,7 @@ static inline int iort_dma_get_ranges(struct device *dev, u64 *size) static inline int iort_iommu_configure_id(struct device *dev, const u32 *id_in) { return -ENODEV; } static inline -void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) +void iort_iommu_get_resv_regions(struct device *dev, struct list_head *head) { } static inline phys_addr_t acpi_iort_dma_get_max_cpu_address(void)