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Commit 7042d6bd authored by Rishabh Bhatnagar's avatar Rishabh Bhatnagar Committed by Gerrit - the friendly Code Review server
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soc: qcom: Add support for per-CPU scandump sizes 



Add support for specification of per-CPU scandump sizes.
If the scandump sizes are not specified in the correct
format, then no memory will be allocated for the scandump
region of any CPU.

Change-Id: I7d8a192f38ed665fec4a53f011fff62f453ffcd3
Signed-off-by: default avatarIsaac J. Manjarres <isaacm@codeaurora.org>
Signed-off-by: default avatarRishabh Bhatnagar <rishabhb@codeaurora.org>
parent 5e29c29e

drivers/soc/qcom/watchdog_v2.c

+20 −7
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.

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

 */



#include <linux/module.h>
@@ -47,7 +47,6 @@ 
#define SCM_SET_REGSAVE_CMD	0x2

#define SCM_SVC_SEC_WDOG_DIS	0x7

#define MAX_CPU_CTX_SIZE	2048

#define MAX_CPU_SCANDUMP_SIZE	0x10100



static struct msm_watchdog_data *wdog_data;
@@ -93,6 +92,7 @@ struct msm_watchdog_data { 
	unsigned long long thread_start;

	unsigned long long ping_start[NR_CPUS];

	unsigned long long ping_end[NR_CPUS];

	unsigned int cpu_scandump_sizes[NR_CPUS];

};



/*
@@ -591,8 +591,10 @@ static void configure_scandump(struct msm_watchdog_data *wdog_dd) 
	int cpu;

	static dma_addr_t dump_addr;

	static void *dump_vaddr;

	unsigned int scandump_size;



	for_each_cpu(cpu, cpu_present_mask) {

		scandump_size = wdog_dd->cpu_scandump_sizes[cpu];

		cpu_data = devm_kzalloc(wdog_dd->dev,

					sizeof(struct msm_dump_data),

					GFP_KERNEL);
@@ -600,17 +602,17 @@ static void configure_scandump(struct msm_watchdog_data *wdog_dd) 
			continue;



		dump_vaddr = (void *) dma_alloc_coherent(wdog_dd->dev,

							 MAX_CPU_SCANDUMP_SIZE,

							 scandump_size,

							 &dump_addr,

							 GFP_KERNEL);

		if (!dump_vaddr) {

			dev_err(wdog_dd->dev, "Couldn't get memory for dump\n");

			continue;

		}

		memset(dump_vaddr, 0x0, MAX_CPU_SCANDUMP_SIZE);

		memset(dump_vaddr, 0x0, scandump_size);



		cpu_data->addr = dump_addr;

		cpu_data->len = MAX_CPU_SCANDUMP_SIZE;

		cpu_data->len = scandump_size;

		snprintf(cpu_data->name, sizeof(cpu_data->name),

			"KSCANDUMP%d", cpu);

		dump_entry.id = MSM_DUMP_DATA_SCANDUMP_PER_CPU + cpu;
@@ -620,7 +622,7 @@ static void configure_scandump(struct msm_watchdog_data *wdog_dd) 
		if (ret) {

			dev_err(wdog_dd->dev, "Dump setup failed, id = %d\n",

				MSM_DUMP_DATA_SCANDUMP_PER_CPU + cpu);

			dma_free_coherent(wdog_dd->dev, MAX_CPU_SCANDUMP_SIZE,

			dma_free_coherent(wdog_dd->dev, scandump_size,

					  dump_vaddr,

					  dump_addr);

			devm_kfree(wdog_dd->dev, cpu_data);
@@ -743,7 +745,7 @@ static int msm_wdog_dt_to_pdata(struct platform_device *pdev, 
{

	struct device_node *node = pdev->dev.of_node;

	struct resource *res;

	int ret;

	int ret, cpu, num_scandump_sizes;



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wdt-base");

	if (!res)
@@ -805,6 +807,17 @@ static int msm_wdog_dt_to_pdata(struct platform_device *pdev, 
	pdata->wakeup_irq_enable = of_property_read_bool(node,

							 "qcom,wakeup-enable");



	num_scandump_sizes = of_property_count_elems_of_size(node,

							"qcom,scandump-sizes",

							sizeof(u32));

	if (num_scandump_sizes < 0 || num_scandump_sizes != num_possible_cpus())

		dev_info(&pdev->dev, "%s scandump sizes property not correct\n",

			__func__);

	else

		for_each_cpu(cpu, cpu_present_mask)

			of_property_read_u32_index(node, "qcom,scandump-sizes",

						   cpu,

					&pdata->cpu_scandump_sizes[cpu]);

	pdata->irq_ppi = irq_is_percpu(pdata->bark_irq);

	dump_pdata(pdata);

	return 0;