PM / Suspend: Add statistics debugfs file for suspend to RAM

[mirror_ubuntu-bionic-kernel.git] / include / linux / suspend.h

diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 6bbcef22e1054766f01a36f6e352c0ea5d06770c..76f42e49b72deea43a190677822070bea4e53eb1 100644 (file)
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -34,6 +34,58 @@ typedef int __bitwise suspend_state_t;
 #define PM_SUSPEND_MEM         ((__force suspend_state_t) 3)
 #define PM_SUSPEND_MAX         ((__force suspend_state_t) 4)
 
+enum suspend_stat_step {
+       SUSPEND_FREEZE = 1,
+       SUSPEND_PREPARE,
+       SUSPEND_SUSPEND,
+       SUSPEND_SUSPEND_NOIRQ,
+       SUSPEND_RESUME_NOIRQ,
+       SUSPEND_RESUME
+};
+
+struct suspend_stats {
+       int     success;
+       int     fail;
+       int     failed_freeze;
+       int     failed_prepare;
+       int     failed_suspend;
+       int     failed_suspend_noirq;
+       int     failed_resume;
+       int     failed_resume_noirq;
+#define        REC_FAILED_NUM  2
+       int     last_failed_dev;
+       char    failed_devs[REC_FAILED_NUM][40];
+       int     last_failed_errno;
+       int     errno[REC_FAILED_NUM];
+       int     last_failed_step;
+       enum suspend_stat_step  failed_steps[REC_FAILED_NUM];
+};
+
+extern struct suspend_stats suspend_stats;
+
+static inline void dpm_save_failed_dev(const char *name)
+{
+       strlcpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev],
+               name,
+               sizeof(suspend_stats.failed_devs[0]));
+       suspend_stats.last_failed_dev++;
+       suspend_stats.last_failed_dev %= REC_FAILED_NUM;
+}
+
+static inline void dpm_save_failed_errno(int err)
+{
+       suspend_stats.errno[suspend_stats.last_failed_errno] = err;
+       suspend_stats.last_failed_errno++;
+       suspend_stats.last_failed_errno %= REC_FAILED_NUM;
+}
+
+static inline void dpm_save_failed_step(enum suspend_stat_step step)
+{
+       suspend_stats.failed_steps[suspend_stats.last_failed_step] = step;
+       suspend_stats.last_failed_step++;
+       suspend_stats.last_failed_step %= REC_FAILED_NUM;
+}
+
 /**
  * struct platform_suspend_ops - Callbacks for managing platform dependent
  *     system sleep states.