From patchwork Mon Mar 27 05:05:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 13188599 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 A8085C77B6C for ; Mon, 27 Mar 2023 05:07:15 +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=F3wCNEYEiHi7KB0lFkkq2K2PvjJhnt1GpZwIpDZMOgE=; b=w8OjyyhfzPtDQg LfGcvWXfEj8/BbBOo/kiCZmxXS3GhKvJvaOmilA7hFKHDOLN3rfRA3Dz0ni+drKZVKc+hsk5IYDvu jRMcKw1PT8r732+yR500bw+xXqI3STMogrkq/O1/FeLQUNT87ciyr3bIfEcmFomqjQ2PZrPOD2JD6 JNRKLd1pGZhcwa2e59bNMl20zZE1ZYDT18aMb3h/z1+WCSlDg9tuYTuRiHIjcU/H72A5cYSjIp1fR tliHi4YadWfk+KqqYDqS4740UJ0WEoYFZ/MhjXDldzP+iUAvaQUY9gF7znlWhKg2aw/jE0YiMQImj rV7i8YNygOsVlH+zWT1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pgf3r-009kx6-25; Mon, 27 Mar 2023 05:06:27 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pgf3e-009ku7-36 for linux-arm-kernel@lists.infradead.org; Mon, 27 Mar 2023 05:06:16 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9D6941042; Sun, 26 Mar 2023 22:06:56 -0700 (PDT) Received: from a077893.blr.arm.com (a077893.blr.arm.com [10.162.42.7]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EB7273F73F; Sun, 26 Mar 2023 22:06:06 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org, suzuki.poulose@arm.com Cc: scclevenger@os.amperecomputing.com, Anshuman Khandual , Rob Herring , Frank Rowand , Russell King , Greg Kroah-Hartman , "Rafael J. Wysocki" , Len Brown , Sudeep Holla , Lorenzo Pieralisi , Mathieu Poirier , Mike Leach , Leo Yan , devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V2 3/5] coresight: etm4x: Drop pid argument from etm4_probe() Date: Mon, 27 Mar 2023 10:35:35 +0530 Message-Id: <20230327050537.30861-4-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230327050537.30861-1-anshuman.khandual@arm.com> References: <20230327050537.30861-1-anshuman.khandual@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230326_220615_096490_B00F3828 X-CRM114-Status: GOOD ( 17.01 ) 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 Coresight device pid can be retrieved from its iomem base address, which is stored in 'struct etm4x_drvdata'. This drops pid argument from etm4_probe() and 'struct etm4_init_arg'. Instead etm4_check_arch_features() derives the coresight device pid with a new helper coresight_get_pid(), right before it is consumed in etm4_hisi_match_pid(). Cc: Mathieu Poirier Cc: Suzuki K Poulose Cc: Mike Leach Cc: Leo Yan Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- .../coresight/coresight-etm4x-core.c | 21 +++++++------------ include/linux/coresight.h | 12 +++++++++++ 2 files changed, 20 insertions(+), 13 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index 5d77571a8df9..3521838ab4fb 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -66,7 +66,6 @@ static u64 etm4_get_access_type(struct etmv4_config *config); static enum cpuhp_state hp_online; struct etm4_init_arg { - unsigned int pid; struct device *dev; struct csdev_access *csa; }; @@ -370,8 +369,10 @@ static void etm4_disable_arch_specific(struct etmv4_drvdata *drvdata) } static void etm4_check_arch_features(struct etmv4_drvdata *drvdata, - unsigned int id) + struct csdev_access *csa) { + unsigned int id = coresight_get_pid(csa); + if (etm4_hisi_match_pid(id)) set_bit(ETM4_IMPDEF_HISI_CORE_COMMIT, drvdata->arch_features); } @@ -385,7 +386,7 @@ static void etm4_disable_arch_specific(struct etmv4_drvdata *drvdata) } static void etm4_check_arch_features(struct etmv4_drvdata *drvdata, - unsigned int id) + struct csdev_access *csa) { } #endif /* CONFIG_ETM4X_IMPDEF_FEATURE */ @@ -1165,7 +1166,7 @@ static void etm4_init_arch_data(void *info) etm4_os_unlock_csa(drvdata, csa); etm4_cs_unlock(drvdata, csa); - etm4_check_arch_features(drvdata, init_arg->pid); + etm4_check_arch_features(drvdata, csa); /* find all capabilities of the tracing unit */ etmidr0 = etm4x_relaxed_read32(csa, TRCIDR0); @@ -2048,7 +2049,7 @@ static int etm4_add_coresight_dev(struct etm4_init_arg *init_arg) return 0; } -static int etm4_probe(struct device *dev, u32 etm_pid) +static int etm4_probe(struct device *dev) { struct etmv4_drvdata *drvdata = dev_get_drvdata(dev); struct csdev_access access = { 0 }; @@ -2077,7 +2078,6 @@ static int etm4_probe(struct device *dev, u32 etm_pid) init_arg.dev = dev; init_arg.csa = &access; - init_arg.pid = etm_pid; /* * Serialize against CPUHP callbacks to avoid race condition @@ -2124,7 +2124,7 @@ static int etm4_probe_amba(struct amba_device *adev, const struct amba_id *id) drvdata->base = base; dev_set_drvdata(dev, drvdata); - ret = etm4_probe(dev, id->id); + ret = etm4_probe(dev); if (!ret) pm_runtime_put(&adev->dev); @@ -2146,12 +2146,7 @@ static int etm4_probe_platform_dev(struct platform_device *pdev) pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); - /* - * System register based devices could match the - * HW by reading appropriate registers on the HW - * and thus we could skip the PID. - */ - ret = etm4_probe(&pdev->dev, 0); + ret = etm4_probe(&pdev->dev); pm_runtime_put(&pdev->dev); return ret; diff --git a/include/linux/coresight.h b/include/linux/coresight.h index f19a47b9bb5a..f85b041ea475 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -370,6 +370,18 @@ static inline u32 csdev_access_relaxed_read32(struct csdev_access *csa, return csa->read(offset, true, false); } +#define CORESIGHT_PIDRn(i) (0xFE0 + ((i) * 4)) + +static inline u32 coresight_get_pid(struct csdev_access *csa) +{ + u32 i, pid = 0; + + for (i = 0; i < 4; i++) + pid |= csdev_access_relaxed_read32(csa, CORESIGHT_PIDRn(i)) << (i * 8); + + return pid; +} + static inline u64 csdev_access_relaxed_read_pair(struct csdev_access *csa, u32 lo_offset, u32 hi_offset) {