Merge "drivers: soc: qcom: Add snapshot of boot stats driver"

drivers/soc/qcom/Kconfig

@@ -230,6 +230,14 @@ config MSM_SERVICE_NOTIFIER
 	  like audio, the identifier for which is provided by the service
 	  locator.
 
+config MSM_BOOT_STATS
+	tristate "Use MSM boot stats reporting"
+	help
+	  Use this to report msm boot stats such as bootloader throughput,
+	  display init, total boot time.
+	  This figures are reported in mpm sleep clock cycles and have a
+	  resolution of 31 bits as 1 bit is used as an overflow check.
+
 config QCOM_QMI_HELPERS
 	tristate
 	depends on ARCH_QCOM || COMPILE_TEST

drivers/soc/qcom/Makefile

@@ -21,6 +21,7 @@ obj-$(CONFIG_QCOM_RPMH)		+= qcom_rpmh.o
 qcom_rpmh-y			+= rpmh-rsc.o
 qcom_rpmh-y			+= rpmh.o
 obj-$(CONFIG_QCOM_SOC_SLEEP_STATS)	+= soc_sleep_stats.o
+obj-$(CONFIG_MSM_BOOT_STATS) += boot_stats.o
 obj-$(CONFIG_QCOM_SMD_RPM)	+= smd-rpm.o
 obj-$(CONFIG_QCOM_SMEM) +=	smem.o
 obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o

drivers/soc/qcom/boot_stats.c

@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/cpu.h>
+#include <linux/sched.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+struct boot_stats {
+	uint32_t bootloader_start;
+	uint32_t bootloader_end;
+	uint32_t bootloader_display;
+	uint32_t bootloader_load_kernel;
+};
+
+static void __iomem *mpm_counter_base;
+static uint32_t mpm_counter_freq;
+static struct boot_stats __iomem *boot_stats;
+
+static int mpm_parse_dt(void)
+{
+	struct device_node *np_imem, *np_mpm2;
+
+	np_imem = of_find_compatible_node(NULL, NULL,
+				"qcom,msm-imem-boot_stats");
+	if (!np_imem) {
+		pr_err("can't find qcom,msm-imem node\n");
+		return -ENODEV;
+	}
+	boot_stats = of_iomap(np_imem, 0);
+	if (!boot_stats) {
+		pr_err("boot_stats: Can't map imem\n");
+		goto err1;
+	}
+
+	np_mpm2 = of_find_compatible_node(NULL, NULL,
+				"qcom,mpm2-sleep-counter");
+	if (!np_mpm2) {
+		pr_err("mpm_counter: can't find DT node\n");
+		goto err1;
+	}
+
+	if (of_property_read_u32(np_mpm2, "clock-frequency", &mpm_counter_freq))
+		goto err2;
+
+	if (of_get_address(np_mpm2, 0, NULL, NULL)) {
+		mpm_counter_base = of_iomap(np_mpm2, 0);
+		if (!mpm_counter_base) {
+			pr_err("mpm_counter: cant map counter base\n");
+			goto err2;
+		}
+	} else
+		goto err2;
+
+	return 0;
+
+err2:
+	of_node_put(np_mpm2);
+err1:
+	of_node_put(np_imem);
+	return -ENODEV;
+}
+
+static void print_boot_stats(void)
+{
+	pr_info("KPI: Bootloader start count = %u\n",
+		readl_relaxed(&boot_stats->bootloader_start));
+	pr_info("KPI: Bootloader end count = %u\n",
+		readl_relaxed(&boot_stats->bootloader_end));
+	pr_info("KPI: Bootloader display count = %u\n",
+		readl_relaxed(&boot_stats->bootloader_display));
+	pr_info("KPI: Bootloader load kernel count = %u\n",
+		readl_relaxed(&boot_stats->bootloader_load_kernel));
+	pr_info("KPI: Kernel MPM timestamp = %u\n",
+		readl_relaxed(mpm_counter_base));
+	pr_info("KPI: Kernel MPM Clock frequency = %u\n",
+		mpm_counter_freq);
+}
+
+static int __init boot_stats_init(void)
+{
+	int ret;
+
+	ret = mpm_parse_dt();
+	if (ret < 0)
+		return -ENODEV;
+
+	print_boot_stats();
+
+	iounmap(boot_stats);
+	iounmap(mpm_counter_base);
+
+	return 0;
+}
+module_init(boot_stats_init);
+
+static void __exit boot_stats_exit(void)
+{
+}
+module_exit(boot_stats_exit)
+
+MODULE_DESCRIPTION("MSM boot stats info driver");
+MODULE_LICENSE("GPL v2");