Merge tag 'u-boot-imx-20190426' of git://git.denx.de/u-boot-imx

[oweals/u-boot.git] / include / log.h

diff --git a/include/log.h b/include/log.h
index 3e99d6e62b69db48976cc7d3f8f09ae6104f5314..7566ba7f2dbbd8f35cb76f6577541df9e43e3dce 100644 (file)
--- a/include/log.h
+++ b/include/log.h
@@ -14,7 +14,7 @@
 
 /** Log levels supported, ranging from most to least important */
 enum log_level_t {
-       LOGL_EMERG = 0,         /*U-Boot is unstable */
+       LOGL_EMERG = 0,         /* U-Boot is unstable */
        LOGL_ALERT,             /* Action must be taken immediately */
        LOGL_CRIT,              /* Critical conditions */
        LOGL_ERR,               /* Error that prevents something from working */
@@ -39,16 +39,19 @@ enum log_level_t {
 enum log_category_t {
        LOGC_FIRST = 0, /* First part mirrors UCLASS_... */
 
-       LOGC_NONE = UCLASS_COUNT,
-       LOGC_ARCH,
-       LOGC_BOARD,
-       LOGC_CORE,
+       LOGC_NONE = UCLASS_COUNT,       /* First number is after all uclasses */
+       LOGC_ARCH,      /* Related to arch-specific code */
+       LOGC_BOARD,     /* Related to board-specific code */
+       LOGC_CORE,      /* Related to core features (non-driver-model) */
        LOGC_DM,        /* Core driver-model */
        LOGC_DT,        /* Device-tree */
        LOGC_EFI,       /* EFI implementation */
+       LOGC_ALLOC,     /* Memory allocation */
+       LOGC_SANDBOX,   /* Related to the sandbox board */
+       LOGC_BLOBLIST,  /* Bloblist */
 
-       LOGC_COUNT,
-       LOGC_END,
+       LOGC_COUNT,     /* Number of log categories */
+       LOGC_END,       /* Sentinel value for a list of log categories */
 };
 
 /* Helper to cast a uclass ID to a log category */
@@ -70,7 +73,8 @@ static inline int log_uc_cat(enum uclass_id id)
  * @return 0 if log record was emitted, -ve on error
  */
 int _log(enum log_category_t cat, enum log_level_t level, const char *file,
-        int line, const char *func, const char *fmt, ...);
+        int line, const char *func, const char *fmt, ...)
+               __attribute__ ((format (__printf__, 6, 7)));
 
 /* Define this at the top of a file to add a prefix to debug messages */
 #ifndef pr_fmt
@@ -88,18 +92,42 @@ int _log(enum log_category_t cat, enum log_level_t level, const char *file,
  */
 #if CONFIG_IS_ENABLED(LOG)
 #define _LOG_MAX_LEVEL CONFIG_VAL(LOG_MAX_LEVEL)
+#define log_err(_fmt...)       log(LOG_CATEGORY, LOGL_ERR, ##_fmt)
+#define log_warning(_fmt...)   log(LOG_CATEGORY, LOGL_WARNING, ##_fmt)
+#define log_notice(_fmt...)    log(LOG_CATEGORY, LOGL_NOTICE, ##_fmt)
+#define log_info(_fmt...)      log(LOG_CATEGORY, LOGL_INFO, ##_fmt)
+#define log_debug(_fmt...)     log(LOG_CATEGORY, LOGL_DEBUG, ##_fmt)
+#define log_content(_fmt...)   log(LOG_CATEGORY, LOGL_DEBUG_CONTENT, ##_fmt)
+#define log_io(_fmt...)                log(LOG_CATEGORY, LOGL_DEBUG_IO, ##_fmt)
 #else
 #define _LOG_MAX_LEVEL LOGL_INFO
+#define log_err(_fmt...)
+#define log_warning(_fmt...)
+#define log_notice(_fmt...)
+#define log_info(_fmt...)
+#define log_debug(_fmt...)
+#define log_content(_fmt...)
+#define log_io(_fmt...)
+#endif
+
+#if CONFIG_IS_ENABLED(LOG)
+#ifdef LOG_DEBUG
+#define _LOG_DEBUG     1
+#else
+#define _LOG_DEBUG     0
 #endif
 
 /* Emit a log record if the level is less that the maximum */
 #define log(_cat, _level, _fmt, _args...) ({ \
        int _l = _level; \
-       if (_l <= _LOG_MAX_LEVEL) \
+       if (CONFIG_IS_ENABLED(LOG) && (_l <= _LOG_MAX_LEVEL || _LOG_DEBUG)) \
                _log((enum log_category_t)(_cat), _l, __FILE__, __LINE__, \
                      __func__, \
                      pr_fmt(_fmt), ##_args); \
        })
+#else
+#define log(_cat, _level, _fmt, _args...)
+#endif
 
 #ifdef DEBUG
 #define _DEBUG 1
@@ -159,15 +187,33 @@ void __assert_fail(const char *assertion, const char *file, unsigned int line,
        ({ if (!(x) && _DEBUG) \
                __assert_fail(#x, __FILE__, __LINE__, __func__); })
 
-#ifdef CONFIG_LOG_ERROR_RETURN
+#if CONFIG_IS_ENABLED(LOG) && defined(CONFIG_LOG_ERROR_RETURN)
+/*
+ * Log an error return value, possibly with a message. Usage:
+ *
+ *     return log_ret(fred_call());
+ *
+ * or:
+ *
+ *     return log_msg_ret("fred failed", fred_call());
+ */
 #define log_ret(_ret) ({ \
        int __ret = (_ret); \
        if (__ret < 0) \
                log(LOG_CATEGORY, LOGL_ERR, "returning err=%d\n", __ret); \
        __ret; \
        })
+#define log_msg_ret(_msg, _ret) ({ \
+       int __ret = (_ret); \
+       if (__ret < 0) \
+               log(LOG_CATEGORY, LOGL_ERR, "%s: returning err=%d\n", _msg, \
+                   __ret); \
+       __ret; \
+       })
 #else
+/* Non-logging versions of the above which just return the error code */
 #define log_ret(_ret) (_ret)
+#define log_msg_ret(_msg, _ret) ((void)(_msg), _ret)
 #endif
 
 /**