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Commit f7834627 authored by Aparna Das's avatar Aparna Das
Browse files

coresight: add memory dump v2 support for etmv4 



Add support to CoreSight ETMv4 driver to register for v2 meomory
dump which allows dumping ETMv4 registers in case of device crash
and subsequently parsing their contents from ramdumps.

Change-Id: Ia4af28e0dbe212367796f298d4434265a1433672
Signed-off-by: default avatarAparna Das <adas@codeaurora.org>
parent 1f2c6555

drivers/coresight/coresight-etmv4.c

+19 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ 
#include <linux/pm_wakeup.h>

#include <asm/sections.h>

#include <soc/qcom/socinfo.h>

#include <soc/qcom/memory_dump.h>



#include "coresight-priv.h"
@@ -387,6 +388,7 @@ struct etm_drvdata { 
	uint8_t				s_ex_level;

	uint8_t				ns_ex_level;

	uint32_t			ext_inp;

	struct msm_dump_data		reg_data;

};



static struct etm_drvdata *etmdrvdata[NR_CPUS];
@@ -3242,6 +3244,8 @@ static int etm_probe(struct platform_device *pdev) 
	struct resource *res;

	uint32_t reg_size;

	static int count;

	void *baddr;

	struct msm_dump_entry dump_entry;

	struct coresight_desc *desc;



	if (coresight_fuse_access_disabled() ||
@@ -3321,6 +3325,21 @@ static int etm_probe(struct platform_device *pdev) 


	clk_disable_unprepare(drvdata->clk);



	baddr = devm_kzalloc(dev, reg_size, GFP_KERNEL);

	if (baddr) {

		drvdata->reg_data.addr = virt_to_phys(baddr);

		drvdata->reg_data.len = reg_size;

		dump_entry.id = MSM_DUMP_DATA_ETM_REG + drvdata->cpu;

		dump_entry.addr = virt_to_phys(&drvdata->reg_data);

		ret = msm_dump_data_register(MSM_DUMP_TABLE_APPS, &dump_entry);

		if (ret) {

			devm_kfree(dev, baddr);

			dev_err(dev, "ETM REG dump setup failed\n");

		}

	} else {

		dev_err(dev, "ETM REG dump space allocation failed\n");

	}



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

	if (!desc) {

		ret = -ENOMEM;