Loading drivers/soc/qcom/Kconfig +9 −0 Original line number Diff line number Diff line Loading @@ -374,6 +374,15 @@ config QCOM_WATCHDOG_V2 deadlocks. It does not run during the bootup process, so it will not catch any early lockups. config QCOM_IRQ_HELPER bool "QCOM Irq Helper" help This enables the irq helper module. It exposes two APIs int irq_blacklist_on(void) and int irq_blacklist_off(void) to other kernel module. These two apis will be used to control the black list used by the irq balancer. config QCOM_MEMORY_DUMP bool "Qualcomm Memory Dump Support" help Loading drivers/soc/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -67,6 +67,7 @@ obj-$(CONFIG_QCOM_MEMORY_DUMP_V2) += memory_dump_v2.o obj-$(CONFIG_QCOM_DCC) += dcc.o obj-$(CONFIG_QCOM_WATCHDOG_V2) += watchdog_v2.o obj-$(CONFIG_QCOM_COMMON_LOG) += common_log.o obj-$(CONFIG_QCOM_IRQ_HELPER) += irq-helper.o obj-$(CONFIG_TRACER_PKT) += tracer_pkt.o obj-$(CONFIG_ICNSS) += icnss.o wlan_firmware_service_v01.o obj-$(CONFIG_SOC_BUS) += socinfo.o Loading drivers/soc/qcom/irq-helper.c 0 → 100644 +179 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/cpu.h> #include <linux/sysfs.h> #include <linux/kobject.h> #include <linux/spinlock.h> #include <linux/slab.h> struct irq_helper { bool enable; bool deploy; uint32_t count; struct kobject kobj; /* spinlock to protect reference count variable 'count' */ spinlock_t lock; }; struct irq_helper_attr { struct attribute attr; ssize_t (*show)(struct kobject *kobj, struct attribute *attr, char *buf); size_t (*store)(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count); }; #define IRQ_HELPER_ATTR(_name, _mode, _show, _store) \ struct irq_helper_attr irq_helper_##_name = \ __ATTR(_name, _mode, _show, _store) #define to_irq_helper(kobj) \ container_of(kobj, struct irq_helper, kobj) #define to_irq_helper_attr(_attr) \ container_of(_attr, struct irq_helper_attr, attr) static ssize_t attr_show(struct kobject *kobj, struct attribute *attr, char *buf) { struct irq_helper_attr *irq_attr = to_irq_helper_attr(attr); ssize_t ret = -EIO; if (irq_attr->show) ret = irq_attr->show(kobj, attr, buf); return ret; } static const struct sysfs_ops irq_helper_sysfs_ops = { .show = attr_show, }; static struct kobj_type irq_helper_ktype = { .sysfs_ops = &irq_helper_sysfs_ops, }; static ssize_t show_deploy(struct kobject *kobj, struct attribute *attr, char *buf) { struct irq_helper *irq = to_irq_helper(kobj); return snprintf(buf, sizeof(irq->deploy), "%u\n", irq->deploy); } IRQ_HELPER_ATTR(irq_blacklist_on, 0444, show_deploy, NULL); static struct irq_helper *irq_h; int irq_blacklist_on(void) { bool flag = false; if (!irq_h) { pr_err("%s: init function is not called", __func__); return -EPERM; } if (!irq_h->enable) { pr_err("%s: enable bit is not set up", __func__); return -EPERM; } spin_lock(&irq_h->lock); irq_h->count++; if (!irq_h->deploy) { irq_h->deploy = true; flag = true; } spin_unlock(&irq_h->lock); if (flag) sysfs_notify(&irq_h->kobj, NULL, "irq_blacklist_on"); return 0; } EXPORT_SYMBOL(irq_blacklist_on); int irq_blacklist_off(void) { bool flag = false; if (!irq_h) { pr_err("%s: init function is not called", __func__); return -EPERM; } if (!irq_h->enable) { pr_err("%s: enable bit is not set up", __func__); return -EPERM; } spin_lock(&irq_h->lock); if (irq_h->count == 0) { pr_err("%s: ref-count is 0, cannot call irq blacklist off.", __func__); spin_unlock(&irq_h->lock); return -EPERM; } irq_h->count--; if (irq_h->count == 0) { irq_h->deploy = false; flag = true; } spin_unlock(&irq_h->lock); if (flag) sysfs_notify(&irq_h->kobj, NULL, "irq_blacklist_on"); return 0; } EXPORT_SYMBOL(irq_blacklist_off); static int __init irq_helper_init(void) { int ret; irq_h = kzalloc(sizeof(struct irq_helper), GFP_KERNEL); if (!irq_h) return -ENOMEM; ret = kobject_init_and_add(&irq_h->kobj, &irq_helper_ktype, kernel_kobj, "%s", "irq_helper"); if (ret) { pr_err("%s:Error in creation kobject_add\n", __func__); goto out_free_irq; } ret = sysfs_create_file(&irq_h->kobj, &irq_helper_irq_blacklist_on.attr); if (ret) { pr_err("%s:Error in sysfs_create_file\n", __func__); goto out_put_kobj; } spin_lock_init(&irq_h->lock); irq_h->count = 0; irq_h->enable = true; return 0; out_put_kobj: koject_put(&irq_h->kobj); out_free_irq: kfree(irq_h); return ret; } module_init(irq_helper_init); static void __exit irq_helper_exit(void) { sysfs_remove_file(&irq_h->kobj, &irq_helper_irq_blacklist_on.attr); kobject_del(&irq_h->kobj); kobject_put(&irq_h->kobj); kfree(irq_h); } module_exit(irq_helper_exit); MODULE_DESCRIPTION("IRQ Helper APIs"); Loading
drivers/soc/qcom/Kconfig +9 −0 Original line number Diff line number Diff line Loading @@ -374,6 +374,15 @@ config QCOM_WATCHDOG_V2 deadlocks. It does not run during the bootup process, so it will not catch any early lockups. config QCOM_IRQ_HELPER bool "QCOM Irq Helper" help This enables the irq helper module. It exposes two APIs int irq_blacklist_on(void) and int irq_blacklist_off(void) to other kernel module. These two apis will be used to control the black list used by the irq balancer. config QCOM_MEMORY_DUMP bool "Qualcomm Memory Dump Support" help Loading
drivers/soc/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -67,6 +67,7 @@ obj-$(CONFIG_QCOM_MEMORY_DUMP_V2) += memory_dump_v2.o obj-$(CONFIG_QCOM_DCC) += dcc.o obj-$(CONFIG_QCOM_WATCHDOG_V2) += watchdog_v2.o obj-$(CONFIG_QCOM_COMMON_LOG) += common_log.o obj-$(CONFIG_QCOM_IRQ_HELPER) += irq-helper.o obj-$(CONFIG_TRACER_PKT) += tracer_pkt.o obj-$(CONFIG_ICNSS) += icnss.o wlan_firmware_service_v01.o obj-$(CONFIG_SOC_BUS) += socinfo.o Loading
drivers/soc/qcom/irq-helper.c 0 → 100644 +179 −0 Original line number Diff line number Diff line /* Copyright (c) 2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/cpu.h> #include <linux/sysfs.h> #include <linux/kobject.h> #include <linux/spinlock.h> #include <linux/slab.h> struct irq_helper { bool enable; bool deploy; uint32_t count; struct kobject kobj; /* spinlock to protect reference count variable 'count' */ spinlock_t lock; }; struct irq_helper_attr { struct attribute attr; ssize_t (*show)(struct kobject *kobj, struct attribute *attr, char *buf); size_t (*store)(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count); }; #define IRQ_HELPER_ATTR(_name, _mode, _show, _store) \ struct irq_helper_attr irq_helper_##_name = \ __ATTR(_name, _mode, _show, _store) #define to_irq_helper(kobj) \ container_of(kobj, struct irq_helper, kobj) #define to_irq_helper_attr(_attr) \ container_of(_attr, struct irq_helper_attr, attr) static ssize_t attr_show(struct kobject *kobj, struct attribute *attr, char *buf) { struct irq_helper_attr *irq_attr = to_irq_helper_attr(attr); ssize_t ret = -EIO; if (irq_attr->show) ret = irq_attr->show(kobj, attr, buf); return ret; } static const struct sysfs_ops irq_helper_sysfs_ops = { .show = attr_show, }; static struct kobj_type irq_helper_ktype = { .sysfs_ops = &irq_helper_sysfs_ops, }; static ssize_t show_deploy(struct kobject *kobj, struct attribute *attr, char *buf) { struct irq_helper *irq = to_irq_helper(kobj); return snprintf(buf, sizeof(irq->deploy), "%u\n", irq->deploy); } IRQ_HELPER_ATTR(irq_blacklist_on, 0444, show_deploy, NULL); static struct irq_helper *irq_h; int irq_blacklist_on(void) { bool flag = false; if (!irq_h) { pr_err("%s: init function is not called", __func__); return -EPERM; } if (!irq_h->enable) { pr_err("%s: enable bit is not set up", __func__); return -EPERM; } spin_lock(&irq_h->lock); irq_h->count++; if (!irq_h->deploy) { irq_h->deploy = true; flag = true; } spin_unlock(&irq_h->lock); if (flag) sysfs_notify(&irq_h->kobj, NULL, "irq_blacklist_on"); return 0; } EXPORT_SYMBOL(irq_blacklist_on); int irq_blacklist_off(void) { bool flag = false; if (!irq_h) { pr_err("%s: init function is not called", __func__); return -EPERM; } if (!irq_h->enable) { pr_err("%s: enable bit is not set up", __func__); return -EPERM; } spin_lock(&irq_h->lock); if (irq_h->count == 0) { pr_err("%s: ref-count is 0, cannot call irq blacklist off.", __func__); spin_unlock(&irq_h->lock); return -EPERM; } irq_h->count--; if (irq_h->count == 0) { irq_h->deploy = false; flag = true; } spin_unlock(&irq_h->lock); if (flag) sysfs_notify(&irq_h->kobj, NULL, "irq_blacklist_on"); return 0; } EXPORT_SYMBOL(irq_blacklist_off); static int __init irq_helper_init(void) { int ret; irq_h = kzalloc(sizeof(struct irq_helper), GFP_KERNEL); if (!irq_h) return -ENOMEM; ret = kobject_init_and_add(&irq_h->kobj, &irq_helper_ktype, kernel_kobj, "%s", "irq_helper"); if (ret) { pr_err("%s:Error in creation kobject_add\n", __func__); goto out_free_irq; } ret = sysfs_create_file(&irq_h->kobj, &irq_helper_irq_blacklist_on.attr); if (ret) { pr_err("%s:Error in sysfs_create_file\n", __func__); goto out_put_kobj; } spin_lock_init(&irq_h->lock); irq_h->count = 0; irq_h->enable = true; return 0; out_put_kobj: koject_put(&irq_h->kobj); out_free_irq: kfree(irq_h); return ret; } module_init(irq_helper_init); static void __exit irq_helper_exit(void) { sysfs_remove_file(&irq_h->kobj, &irq_helper_irq_blacklist_on.attr); kobject_del(&irq_h->kobj); kobject_put(&irq_h->kobj); kfree(irq_h); } module_exit(irq_helper_exit); MODULE_DESCRIPTION("IRQ Helper APIs");
