From patchwork Fri Apr 22 16:29:03 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: 12823737 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 D2B39C433EF for ; Fri, 22 Apr 2022 16:33:03 +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=qWF7B1Ga1mNlWrdhZZOaseFb/KSnw038Kp0k2cVARe4=; b=pkx4Ki3CwJTxzI J1mzDDhEAAIK9/O97Omo4YIwWzlKq1ipE5uJ4KlLfA98evMtHsha/5xtlcrxi2vbE0vi0RB7g2OoW 2qvs1q3vxTztO6j+Voitwo2cr0viJ5rbRYp7ZWZqgVftp6PcfVkxHt179CHMkKw3KrlLdT1GEIuJe 45kPRd81Tm2goFW47fmz4/X63DLwErzR81Gv0tLOIswxCRwnYzpH51XRrhX7BBXtIvP/VrsYgteIk yu1RiLTvsYKOYUn6czMp43Iann5qDISTWWx3aQT5ZjuM/nzStixCWVSuxGmOhphy2ZQfktidsoU8a iXOLkYkwk9K1q1Z3mKGQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nhwCJ-001SUK-0w; Fri, 22 Apr 2022 16:31:55 +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 1nhwAo-001RmZ-45 for linux-arm-kernel@lists.infradead.org; Fri, 22 Apr 2022 16:30:25 +0000 Received: from fraeml710-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KlKZW3Lz4z681D8; Sat, 23 Apr 2022 00:27:47 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml710-chm.china.huawei.com (10.206.15.59) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 22 Apr 2022 18:30:20 +0200 Received: from A2006125610.china.huawei.com (10.202.227.178) 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; Fri, 22 Apr 2022 17:30:12 +0100 From: Shameer Kolothum To: , , CC: , , , , , , , , , , , , Subject: [PATCH v11 5/9] ACPI/IORT: Add a helper to retrieve RMR info directly Date: Fri, 22 Apr 2022 17:29:03 +0100 Message-ID: <20220422162907.1276-6-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20220422162907.1276-1-shameerali.kolothum.thodi@huawei.com> References: <20220422162907.1276-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.202.227.178] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) 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-20220422_093022_633778_BDCEFB9B X-CRM114-Status: GOOD ( 10.35 ) 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 --- drivers/acpi/arm64/iort.c | 28 ++++++++++++++++++++++++++++ include/linux/acpi_iort.h | 8 ++++++++ 2 files changed, 36 insertions(+) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 5be6e8ecca38..c0de17034dff 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -1393,6 +1393,34 @@ 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 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; + + list_for_each_entry_safe(entry, next, head, list) + entry->free(NULL, 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 e5d2de9caf7f..b43be0987b19 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); @@ -46,6 +50,10 @@ 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; }