From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1DC2EC433ED for ; Tue, 20 Apr 2021 09:30:30 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 774AF61042 for ; Tue, 20 Apr 2021 09:30:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 774AF61042 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; 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=D0Ph624LMhqLhwm0gSjwmcDxYaQfPdpaQK5iE+/GvqE=; b=Vuwhv3tFzeTXO/ajKHJa3cM8G uaF/6xJi6N4V9MF13M+SBu9LUmM1A2w6uh57oWOJWfmBZVrqbKbYPXp+QBl2wxWRasIvi+Q0AZYVT bW/uaMBnLXJUMquM5J/5i30PxbsbERY5HHyzf4ZqpI677/4oQ+mt6VCYGJsX9ml91XBaAN5cidiXZ BhNrtEdkqIG2SNGeP2nFUtIexfgkH+1jqrVE8urdLCAHmjy9aoB/TjZtd/ZfNuTx6DmJjQ2hCZKxq B2vOzZzeh3VPlrdUP1MmA0O6Wa3nX9oGZauP6xo262yAMhq78JXwdVYdrSTRzkU+YSw9svNGzgKnw nj5/VMGtA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lYmgW-00BkPk-K1; Tue, 20 Apr 2021 09:28:44 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lYmgE-00BkLt-7M for linux-arm-kernel@desiato.infradead.org; Tue, 20 Apr 2021 09:28:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:CC:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=MdOC/7Ouj3K1ExRwdjx1eLF69hV5lBD2NY8X4ae5E1E=; b=HLmDebxuQAS0Bw/S+uTmM5kC+K Ec1jgxd/PaJxoDeMsu1d0dGYuVw6w0pNjsDBsWmSBJCTAvcDOCvalseVgY+8sTnZtJJ1gqi64VOVP qqng2RL3kJk08OdHQ6iuo210TCs2jOuiI5E95XZpm6xEqk7CV25s739suaoQVpcWbOL5Erdu/uNFn NTxjmrVyQBofjfv6YxZdudIuYJtcuRvZ2syknWSk0N8L+zuGQu9r6KGuT33QiUE63QJGadxuL0W3f arBsyDBG2WFNx7C3wiC6XAs54ZVvzU3hzsyzetUpVPRIMsQTunFPcayTYy1DlE4uAL9pw3yjLMxr6 S3aSzt+A==; Received: from szxga06-in.huawei.com ([45.249.212.32]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lYmg7-00BymQ-9o for linux-arm-kernel@lists.infradead.org; Tue, 20 Apr 2021 09:28:25 +0000 Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4FPdbc3yxwzjZtp; Tue, 20 Apr 2021 17:26:20 +0800 (CST) Received: from A2006125610.china.huawei.com (10.47.83.26) by DGGEMS406-HUB.china.huawei.com (10.3.19.206) with Microsoft SMTP Server id 14.3.498.0; Tue, 20 Apr 2021 17:28:08 +0800 From: Shameer Kolothum To: , , CC: , , , , , , , , , Subject: [PATCH v3 01/10] ACPI/IORT: Add support for RMR node parsing Date: Tue, 20 Apr 2021 10:27:42 +0200 Message-ID: <20210420082751.1829-2-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20210420082751.1829-1-shameerali.kolothum.thodi@huawei.com> References: <20210420082751.1829-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.83.26] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210420_022819_676390_A97F5873 X-CRM114-Status: GOOD ( 17.42 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add support for parsing RMR node information from ACPI. Find associated stream id and smmu node info from the RMR node and populate a linked list with RMR memory descriptors. Signed-off-by: Shameer Kolothum --- drivers/acpi/arm64/iort.c | 104 +++++++++++++++++++++++++++++++++++++- 1 file changed, 103 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index 2494138a6905..bd96c5e3b36e 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -40,6 +40,19 @@ struct iort_fwnode { static LIST_HEAD(iort_fwnode_list); static DEFINE_SPINLOCK(iort_fwnode_lock); +/* + * One entry for IORT RMR. + */ +struct iort_rmr_entry { + struct list_head list; + u32 sid; + struct acpi_iort_node *smmu; + struct acpi_iort_rmr_desc *rmr_desc; + u32 flags; +}; + +static LIST_HEAD(iort_rmr_list); /* list of RMR regions from ACPI */ + /** * iort_set_fwnode() - Create iort_fwnode and use it to register * iommu data in the iort_fwnode_list @@ -393,7 +406,8 @@ static struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node, if (node->type == ACPI_IORT_NODE_NAMED_COMPONENT || node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX || node->type == ACPI_IORT_NODE_SMMU_V3 || - node->type == ACPI_IORT_NODE_PMCG) { + node->type == ACPI_IORT_NODE_PMCG || + node->type == ACPI_IORT_NODE_RMR) { *id_out = map->output_base; return parent; } @@ -1659,6 +1673,91 @@ static void __init iort_enable_acs(struct acpi_iort_node *iort_node) #else static inline void iort_enable_acs(struct acpi_iort_node *iort_node) { } #endif +static int iort_rmr_desc_valid(struct acpi_iort_rmr_desc *desc, u32 count) +{ + int i, j; + + for (i = 0; i < count; i++) { + u64 end, start = desc[i].base_address, length = desc[i].length; + + if (!IS_ALIGNED(start, SZ_64K) || !IS_ALIGNED(length, SZ_64K)) + return -EINVAL; + + end = start + length - 1; + + /* Check for address overlap */ + for (j = i + 1; j < count; j++) { + u64 e_start = desc[j].base_address; + u64 e_end = e_start + desc[j].length - 1; + + if (start <= e_end && end >= e_start) + return -EINVAL; + } + } + + return 0; +} + +static int __init iort_parse_rmr(struct acpi_iort_node *iort_node) +{ + struct acpi_iort_node *smmu; + struct iort_rmr_entry *e; + struct acpi_iort_rmr *rmr; + struct acpi_iort_rmr_desc *rmr_desc; + u32 map_count = iort_node->mapping_count; + u32 sid; + int i, ret = 0; + + if (iort_node->type != ACPI_IORT_NODE_RMR) + return 0; + + if (!iort_node->mapping_offset || map_count != 1) { + pr_err(FW_BUG "Invalid ID mapping, skipping RMR node %p\n", + iort_node); + return -EINVAL; + } + + /* Retrieve associated smmu and stream id */ + smmu = iort_node_get_id(iort_node, &sid, 0); + if (!smmu) { + pr_err(FW_BUG "Invalid SMMU reference, skipping RMR node %p\n", + iort_node); + return -EINVAL; + } + + /* Retrieve RMR data */ + rmr = (struct acpi_iort_rmr *)iort_node->node_data; + if (!rmr->rmr_offset || !rmr->rmr_count) { + pr_err(FW_BUG "Invalid RMR descriptor array, skipping RMR node %p\n", + iort_node); + return -EINVAL; + } + + rmr_desc = ACPI_ADD_PTR(struct acpi_iort_rmr_desc, iort_node, + rmr->rmr_offset); + + ret = iort_rmr_desc_valid(rmr_desc, rmr->rmr_count); + if (ret) { + pr_err(FW_BUG "Invalid RMR descriptor[%d] for node %p, skipping...\n", + i, iort_node); + return ret; + } + + for (i = 0; i < rmr->rmr_count; i++, rmr_desc++) { + e = kmalloc(sizeof(*e), GFP_KERNEL); + if (!e) + return -ENOMEM; + + e->sid = sid; + e->smmu = smmu; + e->rmr_desc = rmr_desc; + e->flags = rmr->flags; + + list_add_tail(&e->list, &iort_rmr_list); + } + + return 0; +} static void __init iort_init_platform_devices(void) { @@ -1688,6 +1787,9 @@ static void __init iort_init_platform_devices(void) iort_enable_acs(iort_node); + if (iort_table->revision == 3) + iort_parse_rmr(iort_node); + ops = iort_get_dev_cfg(iort_node); if (ops) { fwnode = acpi_alloc_fwnode_static(); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel