From patchwork Mon Feb 10 21:39:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Leach X-Patchwork-Id: 11374125 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F1009138D for ; Mon, 10 Feb 2020 21:40:25 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id CECD420733 for ; Mon, 10 Feb 2020 21:40:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fKq6XHAj"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="xT+kKKEL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CECD420733 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=Z5Dl+2KAZ80ztYjiyBA35waJdOu7ExK9+brimZEDWl8=; b=fKq6XHAj9DW4hGv7pixDm4CsCh AHONm+NiZBz83NZaGgGz5HFqI5zchb5I0j6bOspCC8PfzfRwdTG3wrKuUIV9XiqHtbV+PjCD5bhbb 8LU0OajKQpbsLJVYZ02u07LK3x6In6o0XrzSyB9SupVYFv+xjtGqVVMUwVbKy1lTkIyviNEibG8MI f7qm4PfcjyJZOBijmadQFkmJhjsp+w/Vc/2cZVfPL9MEEa7nIieI5iunJc8MsbF3cM9L+9vXa/6c0 6tjMm+wb+IYzVmQHV7N2PiE/LFgOUyA7oO+B5+8Zw8Q0AXZniJmTjdu1Oehof2P8qWSIVIoDR3sKa szEe3dlw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1Gn2-0004G5-9N; Mon, 10 Feb 2020 21:40:24 +0000 Received: from mail-wm1-x343.google.com ([2a00:1450:4864:20::343]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1GmY-0002i2-VN for linux-arm-kernel@lists.infradead.org; Mon, 10 Feb 2020 21:39:56 +0000 Received: by mail-wm1-x343.google.com with SMTP id t14so947431wmi.5 for ; Mon, 10 Feb 2020 13:39:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=tDhVs6CVDINJ1HNHUEVGjWNjJ7PiR8LnUgb8ARuG2ic=; b=xT+kKKELUbYJEut1pXQy7yCr5Ba8DT9YY1HgCjYDCVFSD6pr5KA79OvmdnDq3uofkj rZpgOwWdBhnciXQHrI1HI5PkxvhDTLoTBzRScbO5b4RUg0F/mBT66mnLZPP6zXqtphcE 9vU1eXnyMLAjOsuubA0//KVHhkIBovp2kFJ2RA/mWXvG5dko3BRJmwKeZQhP+yisyeV2 YztfWVPSEIW1WG7hYvGsvnCK09zC6KwX2dyoZk/V+8mO62dBBHX76kqChxMiiw8etvLu WoRUUKBPwFj5nEnU70E2Qs3k0qoujxA541RxE2QzvKl4D98OO4Ya2A7J0UDyK9WOz8uO nV6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=tDhVs6CVDINJ1HNHUEVGjWNjJ7PiR8LnUgb8ARuG2ic=; b=PLB/7qBDzpLKGLSDSRLfeOc9do6eRQXiDo2aZ8Nseo4aw3OpxCcjcOnrfIx8orXIZV e0hVQM8pk3wr2t7wX0MIYfOomOtIRZeRqaLDemVZr0kTat3fa7GlfTHPIRIDmdDnQGkd dNv9ZxGmysh1sawozoZaKL5pKQFYDp8yhXaYMzPWGpUaDB3k39MEIN1Zgb3oEQnVIm6Z 7vX3zL9rdjZt1z/M6U4AkvDnNi+cdvTCRTDvN7Vp79eXkFm6NLA4kx6qbDna9KYQPjqD cwec/rWbvs5E7lpz9oLOyfcfrVGNZnMdoBpJNvilqRnoqU1srXRnQTIFlz4xCkqUNG5q bzYg== X-Gm-Message-State: APjAAAXsyor4MhEIWy9wS8A+UUNyiCyXr15MCr0ecY9wxwbygEm3ijH8 NHf3H8jNzaEKub+1BoQ3GdgLmvj55bI= X-Google-Smtp-Source: APXvYqzBk4sibp0ZgvWVehnTsFJQaapDP12tVYoo8hBhdeKSyN5u3j7vp41gG53snXnSV0Lyge618Q== X-Received: by 2002:a1c:b486:: with SMTP id d128mr1002803wmf.69.1581370792041; Mon, 10 Feb 2020 13:39:52 -0800 (PST) Received: from linaro.org ([2a00:23c5:6815:3901:a1cf:b00b:5683:ed40]) by smtp.gmail.com with ESMTPSA id u14sm2118582wrm.51.2020.02.10.13.39.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2020 13:39:51 -0800 (PST) From: Mike Leach To: mike.leach@linaro.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, coresight@lists.linaro.org, linux-doc@vger.kernel.org Subject: [PATCH v9 02/15] coresight: cti: Add sysfs coresight mgmt reg access. Date: Mon, 10 Feb 2020 21:39:11 +0000 Message-Id: <20200210213924.20037-3-mike.leach@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200210213924.20037-1-mike.leach@linaro.org> References: <20200210213924.20037-1-mike.leach@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200210_133955_088157_928A7A09 X-CRM114-Status: GOOD ( 12.01 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:343 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lorenzo.pieralisi@arm.com, mathieu.poirier@linaro.org, suzuki.poulose@arm.com, linux-arm-msm@vger.kernel.org, corbet@lwn.net, liviu.dudau@arm.com, agross@kernel.org, robh+dt@kernel.org, maxime@cerno.tech, sudeep.holla@arm.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Adds sysfs access to the coresight management registers. Signed-off-by: Mike Leach Reviewed-by: Mathieu Poirier Reviewed-by: Suzuki K Poulose --- .../hwtracing/coresight/coresight-cti-sysfs.c | 53 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-priv.h | 1 + 2 files changed, 54 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-cti-sysfs.c b/drivers/hwtracing/coresight/coresight-cti-sysfs.c index a832b8c6b866..507f8eb487fe 100644 --- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c @@ -62,11 +62,64 @@ static struct attribute *coresight_cti_attrs[] = { NULL, }; +/* register based attributes */ + +/* macro to access RO registers with power check only (no enable check). */ +#define coresight_cti_reg(name, offset) \ +static ssize_t name##_show(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ + u32 val = 0; \ + pm_runtime_get_sync(dev->parent); \ + spin_lock(&drvdata->spinlock); \ + if (drvdata->config.hw_powered) \ + val = readl_relaxed(drvdata->base + offset); \ + spin_unlock(&drvdata->spinlock); \ + pm_runtime_put_sync(dev->parent); \ + return scnprintf(buf, PAGE_SIZE, "0x%x\n", val); \ +} \ +static DEVICE_ATTR_RO(name) + +/* coresight management registers */ +coresight_cti_reg(devaff0, CTIDEVAFF0); +coresight_cti_reg(devaff1, CTIDEVAFF1); +coresight_cti_reg(authstatus, CORESIGHT_AUTHSTATUS); +coresight_cti_reg(devarch, CORESIGHT_DEVARCH); +coresight_cti_reg(devid, CORESIGHT_DEVID); +coresight_cti_reg(devtype, CORESIGHT_DEVTYPE); +coresight_cti_reg(pidr0, CORESIGHT_PERIPHIDR0); +coresight_cti_reg(pidr1, CORESIGHT_PERIPHIDR1); +coresight_cti_reg(pidr2, CORESIGHT_PERIPHIDR2); +coresight_cti_reg(pidr3, CORESIGHT_PERIPHIDR3); +coresight_cti_reg(pidr4, CORESIGHT_PERIPHIDR4); + +static struct attribute *coresight_cti_mgmt_attrs[] = { + &dev_attr_devaff0.attr, + &dev_attr_devaff1.attr, + &dev_attr_authstatus.attr, + &dev_attr_devarch.attr, + &dev_attr_devid.attr, + &dev_attr_devtype.attr, + &dev_attr_pidr0.attr, + &dev_attr_pidr1.attr, + &dev_attr_pidr2.attr, + &dev_attr_pidr3.attr, + &dev_attr_pidr4.attr, + NULL, +}; + static const struct attribute_group coresight_cti_group = { .attrs = coresight_cti_attrs, }; +static const struct attribute_group coresight_cti_mgmt_group = { + .attrs = coresight_cti_mgmt_attrs, + .name = "mgmt", +}; + const struct attribute_group *coresight_cti_groups[] = { &coresight_cti_group, + &coresight_cti_mgmt_group, NULL, }; diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index 82e563cdc879..aba6b789c969 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -22,6 +22,7 @@ #define CORESIGHT_CLAIMCLR 0xfa4 #define CORESIGHT_LAR 0xfb0 #define CORESIGHT_LSR 0xfb4 +#define CORESIGHT_DEVARCH 0xfbc #define CORESIGHT_AUTHSTATUS 0xfb8 #define CORESIGHT_DEVID 0xfc8 #define CORESIGHT_DEVTYPE 0xfcc