From patchwork Thu Feb 16 08:17:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jing Zhang X-Patchwork-Id: 13142704 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 339F2C61DA4 for ; Thu, 16 Feb 2023 08:20:01 +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:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id: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:In-Reply-To:References: List-Owner; bh=DC7L9Izm5vAujpICHGkSqyLFSWkbl+4b6AsF837WYFI=; b=DgyxtLrr0Ehrso afW13O/VrrtdHf5RrN39R+Dps0bu65I604EPAR8K8E/Hc9T5LXX82HqSdQVa+igN9box/sk7xOTTy R5PTUYARQbXpSkPXHaduR7/LOmaeP5G5kMPI94Qfpjt9z35hIjTZYw9DanvIkDQBl6aRLqtmYZf5L +YYenmf3xU3EhwZHakYuIpG9aJoZqPUpf2pbdOjqyzfd5GhdsYs+2/oqQyGS4Tw3uxWHevmOellog scJec0+bEg1lbKdaxukhpNyiuMZ8Naq1Oknd3GJ2Qt8FovHqmcg8FbHZ+ZKuBFe2oMaln0BuNcuj4 Sq2znieWcXTCCiDN4C0A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pSZTt-008yUl-Nm; Thu, 16 Feb 2023 08:19:05 +0000 Received: from out30-112.freemail.mail.aliyun.com ([115.124.30.112]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pSZTp-008ySK-Fq for linux-arm-kernel@lists.infradead.org; Thu, 16 Feb 2023 08:19:03 +0000 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R811e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018045170;MF=renyu.zj@linux.alibaba.com;NM=1;PH=DS;RN=7;SR=0;TI=SMTPD_---0VbnmOMt_1676535472; Received: from srmbuffer011165236051.sqa.eu95(mailfrom:renyu.zj@linux.alibaba.com fp:SMTPD_---0VbnmOMt_1676535472) by smtp.aliyun-inc.com; Thu, 16 Feb 2023 16:18:53 +0800 From: Jing Zhang To: Will Deacon , Mark Rutland Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Shuai Xue , Zhuo Song , Jing Zhang Subject: [PATCH] perf/arm-cmn: Fix and refactor device mapping resource Date: Thu, 16 Feb 2023 16:17:50 +0800 Message-Id: <1676535470-120560-1-git-send-email-renyu.zj@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230216_001901_736534_1CB3FBA4 X-CRM114-Status: GOOD ( 18.47 ) 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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The devm_platform_ioremap_resource() won't let the platform device claim resource when the ACPI companion device has already claimed it. If CMN-ANY except CMN600 is ACPI companion device, it will return -EBUSY in devm_platform_ioremap_resource(), and the driver cannot be successfully installed. So let ACPI companion device call arm_cmn_acpi_probe and not claim resource again. In addition, the arm_cmn_acpi_probe() and arm_cmn_of_probe() functions are refactored to make them compatible with both CMN600 and CMN-ANY. Fixes: 61ec1d875812 ("perf/arm-cmn: Demarcate CMN-600 specifics") Signed-off-by: Jing Zhang --- drivers/perf/arm-cmn.c | 57 ++++++++++++++++++++++++++++++++------------------ 1 file changed, 37 insertions(+), 20 deletions(-) diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 1deb61b..beb3b37 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -2206,7 +2206,7 @@ static int arm_cmn_discover(struct arm_cmn *cmn, unsigned int rgn_offset) return 0; } -static int arm_cmn600_acpi_probe(struct platform_device *pdev, struct arm_cmn *cmn) +static int arm_cmn_acpi_probe(struct platform_device *pdev, struct arm_cmn *cmn) { struct resource *cfg, *root; @@ -2214,12 +2214,21 @@ static int arm_cmn600_acpi_probe(struct platform_device *pdev, struct arm_cmn *c if (!cfg) return -EINVAL; - root = platform_get_resource(pdev, IORESOURCE_MEM, 1); - if (!root) - return -EINVAL; + /* If ACPI defines more than one resource, such as cmn-600, then there may be + * a deviation between ROOTNODEBASE and PERIPHBASE, and ROOTNODEBASE can + * be obtained from the second resource. Otherwise, it can be considered that + * ROOT NODE BASE is PERIPHBASE. This is compatible with cmn-600 and cmn-any. + */ + if (pdev->num_resources > 1) { + root = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!root) + return -EINVAL; - if (!resource_contains(cfg, root)) - swap(cfg, root); + if (!resource_contains(cfg, root)) + swap(cfg, root); + } else { + root = cfg; + } /* * Note that devm_ioremap_resource() is dumb and won't let the platform * device claim cfg when the ACPI companion device has already claimed @@ -2227,17 +2236,30 @@ static int arm_cmn600_acpi_probe(struct platform_device *pdev, struct arm_cmn *c * appropriate name, we don't really need to do it again here anyway. */ cmn->base = devm_ioremap(cmn->dev, cfg->start, resource_size(cfg)); - if (!cmn->base) - return -ENOMEM; + if (IS_ERR(cmn->base)) + return PTR_ERR(cmn->base); return root->start - cfg->start; } -static int arm_cmn600_of_probe(struct device_node *np) +static int arm_cmn_of_probe(struct platform_device *pdev, struct arm_cmn *cmn) { u32 rootnode; + int ret; + + cmn->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(cmn->base)) + return PTR_ERR(cmn->base); - return of_property_read_u32(np, "arm,root-node", &rootnode) ?: rootnode; + /* If of_property_read_u32() return EINVAL, it means that device tree has + * not define root-node, and root-node will return 0, which is compatible + * with cmn-600 and cmn-any. + */ + ret = of_property_read_u32(pdev->dev.of_node, "arm,root-node", &rootnode); + if (ret == -EINVAL) + return 0; + + return rootnode; } static int arm_cmn_probe(struct platform_device *pdev) @@ -2255,16 +2277,11 @@ static int arm_cmn_probe(struct platform_device *pdev) cmn->model = (unsigned long)device_get_match_data(cmn->dev); platform_set_drvdata(pdev, cmn); - if (cmn->model == CMN600 && has_acpi_companion(cmn->dev)) { - rootnode = arm_cmn600_acpi_probe(pdev, cmn); - } else { - rootnode = 0; - cmn->base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(cmn->base)) - return PTR_ERR(cmn->base); - if (cmn->model == CMN600) - rootnode = arm_cmn600_of_probe(pdev->dev.of_node); - } + if (has_acpi_companion(cmn->dev)) + rootnode = arm_cmn_acpi_probe(pdev, cmn); + else + rootnode = arm_cmn_of_probe(pdev, cmn); + if (rootnode < 0) return rootnode;