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Commit d646008f authored by Tao,Zhang's avatar Tao,Zhang
Browse files

coresight: csr: Set EOT on periodic flush 



Set EOT on periodic flush for lagoon long periodic flush time issue
workaround. It could make USB flush in low rate not see a big
lantency.

Change-Id: I768fb04317b184212ccae4e2912b5c538ac970de
Signed-off-by: default avatarTao,Zhang <taozha@codeaurora.org>
parent f8b00cea

drivers/hwtracing/coresight/coresight-csr.c

+18 −2
Original line number Original line Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

// SPDX-License-Identifier: GPL-2.0-only

/*

/*

 * Copyright (c) 2012-2013, 2015-2017, 2019 The Linux Foundation. All rights reserved.

 * Copyright (c) 2012-2013, 2015-2017, 2019-2020 The Linux Foundation. All rights reserved.

 */

 */





#include <linux/kernel.h>

#include <linux/kernel.h>
@@ -66,8 +66,11 @@ do { \ 
#define BLKSIZE_1024		2

#define BLKSIZE_1024		2

#define BLKSIZE_2048		3

#define BLKSIZE_2048		3





#define FLUSHPERIOD_1	    0x1

#define FLUSHPERIOD_2048	0x800

#define FLUSHPERIOD_2048	0x800





#define PERFLSHEOT_BIT	    BIT(18)



struct csr_drvdata {

struct csr_drvdata {

	void __iomem		*base;

	void __iomem		*base;

	phys_addr_t		pbase;

	phys_addr_t		pbase;
@@ -79,6 +82,7 @@ struct csr_drvdata { 
	struct clk		*clk;

	struct clk		*clk;

	spinlock_t		spin_lock;

	spinlock_t		spin_lock;

	bool			usb_bam_support;

	bool			usb_bam_support;

	bool			perflsheot_set_support;

	bool			hwctrl_set_support;

	bool			hwctrl_set_support;

	bool			set_byte_cntr_support;

	bool			set_byte_cntr_support;

	bool			timestamp_support;

	bool			timestamp_support;
@@ -153,6 +157,8 @@ void msm_qdss_csr_enable_flush(struct coresight_csr *csr) 




	usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);

	usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);

	usbflshctrl |= 0x2;

	usbflshctrl |= 0x2;

	if (drvdata->perflsheot_set_support)

		usbflshctrl |= PERFLSHEOT_BIT;

	csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);

	csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);





	CSR_LOCK(drvdata);

	CSR_LOCK(drvdata);
@@ -205,6 +211,8 @@ void msm_qdss_csr_disable_flush(struct coresight_csr *csr) 




	usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);

	usbflshctrl = csr_readl(drvdata, CSR_USBFLSHCTRL);

	usbflshctrl &= ~0x2;

	usbflshctrl &= ~0x2;

	if (drvdata->perflsheot_set_support)

		usbflshctrl &= ~PERFLSHEOT_BIT;

	csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);

	csr_writel(drvdata, usbflshctrl, CSR_USBFLSHCTRL);





	CSR_LOCK(drvdata);

	CSR_LOCK(drvdata);
@@ -479,8 +487,16 @@ static int csr_probe(struct platform_device *pdev) 
		dev_dbg(dev, "aodbg_csr_support operation not supported\n");

		dev_dbg(dev, "aodbg_csr_support operation not supported\n");

	else

	else

		dev_dbg(dev, "aodbg_csr_support operation supported\n");

		dev_dbg(dev, "aodbg_csr_support operation supported\n");

	drvdata->perflsheot_set_support = of_property_read_bool(

			pdev->dev.of_node, "qcom,perflsheot-set-support");

	if (!drvdata->perflsheot_set_support)

		dev_dbg(dev, "perflsheot_set_support handled by other subsystem\n");

	else

		dev_dbg(dev, "perflsheot_set_support operation supported\n");





	if (drvdata->usb_bam_support)

	if (drvdata->perflsheot_set_support)

		drvdata->flushperiod = FLUSHPERIOD_1;

	else if (drvdata->usb_bam_support)

		drvdata->flushperiod = FLUSHPERIOD_2048;

		drvdata->flushperiod = FLUSHPERIOD_2048;





	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);

	desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);