From patchwork Mon Apr 4 12:42:05 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: 12800169 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 85357C433EF for ; Mon, 4 Apr 2022 12:44:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347634AbiDDMqE (ORCPT ); Mon, 4 Apr 2022 08:46:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55578 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347646AbiDDMqE (ORCPT ); Mon, 4 Apr 2022 08:46:04 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 05F6931923 for ; Mon, 4 Apr 2022 05:44:08 -0700 (PDT) Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KX9Qm669Sz685ZZ; Mon, 4 Apr 2022 20:42:24 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml714-chm.china.huawei.com (10.206.15.33) 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 14:44:06 +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 13:43:57 +0100 From: Shameer Kolothum To: , , CC: , , , , , , , , , , , , Subject: [PATCH v9 07/11] ACPI/IORT: Add a helper to retrieve RMR info directly Date: Mon, 4 Apr 2022 13:42:05 +0100 Message-ID: <20220404124209.1086-8-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 This will provide a way for SMMU drivers to retrieve StreamIDs associated with IORT RMR nodes and use that to set bypass settings for those IDs. Signed-off-by: Shameer Kolothum Reviewed-by: Lorenzo Pieralisi --- drivers/acpi/arm64/iort.c | 29 +++++++++++++++++++++++++++++ include/linux/acpi_iort.h | 8 ++++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 1147387cfddb..fb2b0163c27d 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -1402,6 +1402,35 @@ int iort_dma_get_ranges(struct device *dev, u64 *size) return nc_dma_get_range(dev, size); } +/** + * iort_get_rmr_sids - Retrieve IORT RMR node reserved regions with + * associated StreamIDs information. + * @iommu_fwnode: fwnode associated with IOMMU + * @head: Resereved region list + */ +void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, + struct list_head *head) +{ + iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head); +} +EXPORT_SYMBOL_GPL(iort_get_rmr_sids); + +/** + * iort_put_rmr_sids - Free all the memory allocated for RMR reserved regions. + * @iommu_fwnode: fwnode associated with IOMMU + * @head: Resereved region list + */ +void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, + struct list_head *head) +{ + struct iommu_resv_region *entry, *next; + + iort_iommu_put_resv_regions(NULL, head); + list_for_each_entry_safe(entry, next, head, list) + kfree(entry); +} +EXPORT_SYMBOL_GPL(iort_put_rmr_sids); + static void __init acpi_iort_register_irq(int hwirq, const char *name, int trigger, struct resource *res) diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index eb3c28853110..774b8bc16573 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -33,6 +33,10 @@ struct irq_domain *iort_get_device_domain(struct device *dev, u32 id, enum irq_domain_bus_token bus_token); void acpi_configure_pmsi_domain(struct device *dev); int iort_pmsi_get_dev_id(struct device *dev, u32 *dev_id); +void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, + struct list_head *head); +void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, + struct list_head *head); /* IOMMU interface */ int iort_dma_get_ranges(struct device *dev, u64 *size); int iort_iommu_configure_id(struct device *dev, const u32 *id_in); @@ -47,6 +51,10 @@ static inline struct irq_domain *iort_get_device_domain( struct device *dev, u32 id, enum irq_domain_bus_token bus_token) { return NULL; } static inline void acpi_configure_pmsi_domain(struct device *dev) { } +static inline +void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { } +static inline +void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode, struct list_head *head) { } /* IOMMU interface */ static inline int iort_dma_get_ranges(struct device *dev, u64 *size) { return -ENODEV; }