Merge "coresight: csr: update programming sequence of enabling etr to bam" (f3ac06c5) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/hwtracing/coresight/coresight-common.h

+2 −1

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0-only */
		/*
		* Copyright (c) 2018, The Linux Foundation. All rights reserved.
		* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
		*/

		#ifndef _CORESIGHT_COMMON_H
		@@ -16,6 +16,7 @@ struct coresight_csr {

		#ifdef CONFIG_CORESIGHT_CSR
		extern void msm_qdss_csr_enable_bam_to_usb(struct coresight_csr *csr);
		extern void msm_qdss_csr_enable_flush(struct coresight_csr *csr);
		extern void msm_qdss_csr_disable_bam_to_usb(struct coresight_csr *csr);
		extern void msm_qdss_csr_disable_flush(struct coresight_csr *csr);
		extern int coresight_csr_hwctrl_set(struct coresight_csr *csr, uint64_t addr,

drivers/hwtracing/coresight/coresight-csr.c

+106 −10

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2012-2013, 2015-2-17 The Linux Foundation. All rights reserved.
		* Copyright (c) 2012-2013, 2015-2017, 2019 The Linux Foundation. All rights reserved.
		*/

		#include <linux/kernel.h>
		@@ -66,12 +66,15 @@ do { \
		#define BLKSIZE_1024 2
		#define BLKSIZE_2048 3

		#define FLUSHPERIOD_2048 0x800

		struct csr_drvdata {
		void __iomem *base;
		phys_addr_t pbase;
		struct device *dev;
		struct coresight_device *csdev;
		uint32_t blksize;
		uint32_t flushperiod;
		struct coresight_csr csr;
		struct clk *clk;
		spinlock_t spin_lock;
		@@ -79,6 +82,7 @@ struct csr_drvdata {
		bool hwctrl_set_support;
		bool set_byte_cntr_support;
		bool timestamp_support;
		bool enable_flush;
		};

		static LIST_HEAD(csr_list);
		@@ -86,10 +90,23 @@ static DEFINE_MUTEX(csr_lock);

		#define to_csr_drvdata(c) container_of(c, struct csr_drvdata, csr)

		static void msm_qdss_csr_config_flush_period(struct csr_drvdata *drvdata)
		{
		uint32_t usbflshctrl;

		CSR_UNLOCK(drvdata);

		usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);
		usbflshctrl = (usbflshctrl & ~0x3FFFC) \| (drvdata->flushperiod << 2);
		csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);

		CSR_LOCK(drvdata);
		}

		void msm_qdss_csr_enable_bam_to_usb(struct coresight_csr *csr)
		{
		struct csr_drvdata *drvdata;
		uint32_t usbbamctrl, usbflshctrl;
		uint32_t usbbamctrl;
		unsigned long flags;

		if (csr == NULL)
		@@ -106,12 +123,6 @@ void msm_qdss_csr_enable_bam_to_usb(struct coresight_csr *csr)
		usbbamctrl = (usbbamctrl & ~0x3) \| drvdata->blksize;
		csr_writel(drvdata, usbbamctrl, CSR_USBBAMCTRL);

		usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);
		usbflshctrl = (usbflshctrl & ~0x3FFFC) \| (0xFFFF << 2);
		csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);
		usbflshctrl \|= 0x2;
		csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);

		usbbamctrl \|= 0x4;
		csr_writel(drvdata, usbbamctrl, CSR_USBBAMCTRL);

		@@ -120,6 +131,36 @@ void msm_qdss_csr_enable_bam_to_usb(struct coresight_csr *csr)
		}
		EXPORT_SYMBOL(msm_qdss_csr_enable_bam_to_usb);

		void msm_qdss_csr_enable_flush(struct coresight_csr *csr)
		{
		struct csr_drvdata *drvdata;
		uint32_t usbflshctrl;
		unsigned long flags;

		if (csr == NULL)
		return;

		drvdata = to_csr_drvdata(csr);
		if (IS_ERR_OR_NULL(drvdata) \|\| !drvdata->usb_bam_support)
		return;

		spin_lock_irqsave(&drvdata->spin_lock, flags);

		msm_qdss_csr_config_flush_period(drvdata);

		CSR_UNLOCK(drvdata);

		usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);
		usbflshctrl \|= 0x2;
		csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);

		CSR_LOCK(drvdata);
		drvdata->enable_flush = true;
		spin_unlock_irqrestore(&drvdata->spin_lock, flags);
		}
		EXPORT_SYMBOL(msm_qdss_csr_enable_flush);


		void msm_qdss_csr_disable_bam_to_usb(struct coresight_csr *csr)
		{
		struct csr_drvdata *drvdata;
		@@ -166,6 +207,7 @@ void msm_qdss_csr_disable_flush(struct coresight_csr *csr)
		csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);

		CSR_LOCK(drvdata);
		drvdata->enable_flush = false;
		spin_unlock_irqrestore(&drvdata->spin_lock, flags);
		}
		EXPORT_SYMBOL(msm_qdss_csr_disable_flush);
		@@ -295,14 +337,66 @@ static ssize_t timestamp_show(struct device *dev,

		static DEVICE_ATTR_RO(timestamp);

		static ssize_t flushperiod_show(struct device *dev,
		struct device_attribute *attr,
		char *buf)
		{
		struct csr_drvdata *drvdata = dev_get_drvdata(dev->parent);

		if (IS_ERR_OR_NULL(drvdata) \|\| !drvdata->usb_bam_support) {
		dev_err(dev, "Invalid param\n");
		return -EINVAL;
		}

		return scnprintf(buf, PAGE_SIZE, "%#lx\n", drvdata->flushperiod);
		}

		static ssize_t flushperiod_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf,
		size_t size)
		{
		unsigned long flags;
		unsigned long val;
		struct csr_drvdata *drvdata = dev_get_drvdata(dev->parent);

		if (IS_ERR_OR_NULL(drvdata) \|\| !drvdata->usb_bam_support) {
		dev_err(dev, "Invalid param\n");
		return -EINVAL;
		}

		spin_lock_irqsave(&drvdata->spin_lock, flags);

		if (kstrtoul(buf, 0, &val) \|\| val > 0xffff) {
		spin_unlock_irqrestore(&drvdata->spin_lock, flags);
		return -EINVAL;
		}

		if (drvdata->flushperiod == val)
		goto out;

		drvdata->flushperiod = val;

		if (drvdata->enable_flush)
		msm_qdss_csr_config_flush_period(drvdata);

		out:
		spin_unlock_irqrestore(&drvdata->spin_lock, flags);
		return size;
		}

		static DEVICE_ATTR_RW(flushperiod);

		static struct attribute *csr_attrs[] = {
		&dev_attr_timestamp.attr,
		&dev_attr_flushperiod.attr,
		NULL,
		};

		static struct attribute_group csr_attr_grp = {
		.attrs = csr_attrs,
		};

		static const struct attribute_group *csr_attr_grps[] = {
		&csr_attr_grp,
		NULL,
		@@ -374,13 +468,15 @@ static int csr_probe(struct platform_device *pdev)
		else
		dev_dbg(dev, "timestamp_support operation supported\n");

		if (drvdata->usb_bam_support)
		drvdata->flushperiod = FLUSHPERIOD_2048;

		desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
		if (!desc)
		return -ENOMEM;
		desc->type = CORESIGHT_DEV_TYPE_NONE;
		desc->pdata = pdev->dev.platform_data;
		desc->dev = &pdev->dev;
		if (drvdata->timestamp_support)
		desc->groups = csr_attr_grps;

		drvdata->csdev = coresight_register(desc);

drivers/hwtracing/coresight/coresight-tmc-etr.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1115,6 +1115,7 @@ static void __tmc_etr_enable_to_bam(struct tmc_drvdata *drvdata)

		CS_LOCK(drvdata->base);

		msm_qdss_csr_enable_flush(drvdata->csr);
		drvdata->enable_to_bam = true;
		}