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: 12800159 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CC359C433F5 for ; Mon, 4 Apr 2022 12:46:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zZV9QAfzm0b9kCDsSnNxmrbylSvj6kSI8tZ/2vF9dI4=; b=bp7NF3kTlUcZRU HuwidiR5xpLjZA810QdhwUF7XZEzPjMz0KVD5jH561+g50ECGh12NN5xFGdNFm2aY85X8YNuv0kM5 ikSQ5iRsCBisIIwABS86zQmpFY8XZfWiZxqIK5CQYh3ZwYv9IKtsxnQ66xi4MHTUcYbWarDVeW6Eg 0ggnr02OK2KOCIGHDKs92sYqaifm+ZXHZL7WO9mOx5znzgNSsE0QwDKJfuiLJpOeg6C93z2NJOk9/ UuMxy1/If0OKhps+RETKt9dm59lOThhSeHqtHIa1Y3sf6p+gAof1y3FbzuyX0uU4RJOxEuKuwmKr6 TCPNzLFpU64Nr74vn6Aw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbM4r-00EwOu-1D; Mon, 04 Apr 2022 12:45:01 +0000 Received: from frasgout.his.huawei.com ([185.176.79.56]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nbM40-00Evuk-02 for linux-arm-kernel@lists.infradead.org; Mon, 04 Apr 2022 12:44:09 +0000 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220404_054408_361974_8539810A X-CRM114-Status: GOOD ( 10.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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; }