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Commit ca85f991 authored by Elliot Berman's avatar Elliot Berman
Browse files

power: reset: qcom-dload-mode: Add support for changing dump mode 



Beyond full dump download mode, there is also a minidump download mode
and a dump mode which includes full dump and minidump. Add support for
changing dump mode with /sys/kernel/dload/dload_mode sysfs entry and for
toggling whether a download dump mode is used with msm_enable_dump_mode.

Change-Id: I20248df51e8df55c30c0c4f9c46291697cee189b
Signed-off-by: default avatarElliot Berman <eberman@codeaurora.org>
parent a54b8a7d

drivers/power/reset/qcom-dload-mode.c

+82 −8
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/reboot.h>

#include <linux/pm.h>

#include <linux/qcom_scm.h>

#include <soc/qcom/minidump.h>



enum qcom_download_dest {

	QCOM_DOWNLOAD_DEST_UNKNOWN = -1,
@@ -32,16 +33,47 @@ struct qcom_dload { 


#define to_qcom_dload(o) container_of(o, struct qcom_dload, kobj)



#define QCOM_DOWNLOAD_BOTHDUMP (QCOM_DOWNLOAD_FULLDUMP | QCOM_DOWNLOAD_MINIDUMP)



static bool enable_dump =

	IS_ENABLED(CONFIG_POWER_RESET_QCOM_DOWNLOAD_MODE_DEFAULT);

static enum qcom_download_mode current_download_mode = QCOM_DOWNLOAD_NODUMP;

static enum qcom_download_mode dump_mode = QCOM_DOWNLOAD_FULLDUMP;



static int set_download_mode(enum qcom_download_mode mode)

{

	if ((mode & QCOM_DOWNLOAD_MINIDUMP) && !msm_minidump_enabled()) {

		mode &= ~QCOM_DOWNLOAD_MINIDUMP;

		pr_warn("Minidump not enabled.\n");

		if (!mode)

			return -ENODEV;

	}

	current_download_mode = mode;

	qcom_scm_set_download_mode(mode, 0);

	return 0;

}



static int set_dump_mode(enum qcom_download_mode mode)

{

	int ret = 0;



	if (enable_dump) {

		ret = set_download_mode(mode);

		if (likely(!ret))

			dump_mode = mode;

	} else

		dump_mode = mode;

	return ret;

}



static void msm_enable_dump_mode(bool enable)

{

	if (enable)

		set_download_mode(dump_mode);

	else

		set_download_mode(QCOM_DOWNLOAD_NODUMP);

}



static void set_download_dest(struct qcom_dload *poweroff,

			      enum qcom_download_dest dest)

{
@@ -66,7 +98,7 @@ static int param_set_download_mode(const char *val, 
	if (ret)

		return ret;



	set_download_mode(QCOM_DOWNLOAD_FULLDUMP);

	msm_enable_dump_mode(true);



	return 0;

}
@@ -154,8 +186,53 @@ static ssize_t emmc_dload_store(struct kobject *kobj, 
}

static struct reset_attribute attr_emmc_dload = __ATTR_RW(emmc_dload);



static ssize_t dload_mode_show(struct kobject *kobj,

			       struct attribute *this,

			       char *buf)

{

	const char *mode;



	switch ((unsigned int)dump_mode) {

	case QCOM_DOWNLOAD_FULLDUMP:

		mode = "full";

		break;

	case QCOM_DOWNLOAD_MINIDUMP:

		mode = "mini";

		break;

	case QCOM_DOWNLOAD_BOTHDUMP:

		mode = "both";

		break;

	default:

		mode = "unknown";

		break;

	}

	return scnprintf(buf, PAGE_SIZE, "DLOAD dump type: %s\n", mode);

}

static ssize_t dload_mode_store(struct kobject *kobj,

				struct attribute *this,

				const char *buf, size_t count)

{

	enum qcom_download_mode mode;



	if (sysfs_streq(buf, "full"))

		mode = QCOM_DOWNLOAD_FULLDUMP;

	else if (sysfs_streq(buf, "mini"))

		mode = QCOM_DOWNLOAD_MINIDUMP;

	else if (sysfs_streq(buf, "both"))

		mode = QCOM_DOWNLOAD_BOTHDUMP;

	else {

		pr_err("Invalid dump mode request...\n");

		pr_err("Supported dumps: 'full', 'mini', or 'both'\n");

		return -EINVAL;

	}



	return set_dump_mode(mode) ? : count;

}

static struct reset_attribute attr_dload_mode = __ATTR_RW(dload_mode);



static struct attribute *qcom_dload_attrs[] = {

	&attr_emmc_dload.attr,

	&attr_dload_mode.attr,

	NULL

};

static struct attribute_group qcom_dload_attr_group = {
@@ -169,7 +246,7 @@ static int qcom_dload_panic(struct notifier_block *this, unsigned long event, 
						     panic_nb);

	poweroff->in_panic = true;

	if (enable_dump)

		set_download_mode(QCOM_DOWNLOAD_FULLDUMP);

		msm_enable_dump_mode(true);

	return NOTIFY_OK;

}
@@ -188,7 +265,7 @@ static int qcom_dload_reboot(struct notifier_block *this, unsigned long event, 
		if (!strcmp(cmd, "edl"))

			set_download_mode(QCOM_DOWNLOAD_EDL);

		else if (!strcmp(cmd, "qcom_dload"))

			set_download_mode(QCOM_DOWNLOAD_FULLDUMP);

			msm_enable_dump_mode(true);

	}



	if (current_download_mode != QCOM_DOWNLOAD_NODUMP)
@@ -261,12 +338,9 @@ static int qcom_dload_probe(struct platform_device *pdev) 
	poweroff->dload_dest_addr = map_prop_mem("qcom,msm-imem-dload-type");

	store_kaslr_offset();



	if (enable_dump)

		set_download_mode(QCOM_DOWNLOAD_FULLDUMP);

	else {

		set_download_mode(QCOM_DOWNLOAD_NODUMP);

	msm_enable_dump_mode(enable_dump);

	if (!enable_dump)

		qcom_scm_disable_sdi();

	}



	poweroff->panic_nb.notifier_call = qcom_dload_panic;

	poweroff->panic_nb.priority = INT_MAX;

include/soc/qcom/restart.h

+4 −3
Original line number Diff line number Diff line
@@ -3,8 +3,8 @@ 
 * Copyright (c) 2011-2014, 2016, 2018, 2020 The Linux Foundation. All rights reserved.

 */



#ifndef _ASM_ARCH_MSM_RESTART_H_

#define _ASM_ARCH_MSM_RESTART_H_

#ifndef _SOC_QCOM_MSM_RESTART_H_

#define _SOC_QCOM_MSM_RESTART_H_



#define RESTART_NORMAL 0x0

#define RESTART_DLOAD  0x1
@@ -12,5 +12,6 @@ 
void msm_set_restart_mode(int mode);

extern int pmic_reset_irq;



#endif

void msm_enable_dump_mode(bool enable);



#endif