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2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da 
 kernel/arch/s390/include/asm/debug.h
....@@ -2,17 +2,17 @@
22 /*
33  *   S/390 debug facility
44  *
5
- *    Copyright IBM Corp. 1999, 2000
5
+ *    Copyright IBM Corp. 1999, 2020
66  */
7
-#ifndef DEBUG_H
8
-#define DEBUG_H
7
+#ifndef _ASM_S390_DEBUG_H
8
+#define _ASM_S390_DEBUG_H
99 
1010 #include <linux/string.h>
1111 #include <linux/spinlock.h>
1212 #include <linux/kernel.h>
1313 #include <linux/time.h>
1414 #include <linux/refcount.h>
15
-#include <uapi/asm/debug.h>
15
+#include <linux/fs.h>
1616 
1717 #define DEBUG_MAX_LEVEL		   6  /* debug levels range from 0 to 6 */
1818 #define DEBUG_OFF_LEVEL		   -1 /* level where debug is switched off */
....@@ -25,6 +25,16 @@
2525 
2626 #define DEBUG_DATA(entry) (char *)(entry + 1) /* data is stored behind */
2727 					      /* the entry information */
28
+
29
+#define __DEBUG_FEATURE_VERSION	   3  /* version of debug feature */
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+
31
+struct __debug_entry {
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+	unsigned long clock	: 60;
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+	unsigned long exception	:  1;
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+	unsigned long level	:  3;
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+	void *caller;
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+	unsigned short cpu;
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+} __packed;
2838 
2939 typedef struct __debug_entry debug_entry_t;
3040 
....@@ -82,7 +92,6 @@
8292 };
8393 
8494 extern struct debug_view debug_hex_ascii_view;
85
-extern struct debug_view debug_raw_view;
8695 extern struct debug_view debug_sprintf_view;
8796 
8897 /* do NOT use the _common functions */
....@@ -107,13 +116,37 @@
107116 void debug_set_level(debug_info_t *id, int new_level);
108117 
109118 void debug_set_critical(void);
119
+
110120 void debug_stop_all(void);
111121 
122
+/**
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+ * debug_level_enabled() - Returns true if debug events for the specified
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+ *			   level would be logged. Otherwise returns false.
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+ *
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+ * @id:		handle for debug log
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+ * @level:	debug level
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+ *
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+ * Return:
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+ * - %true if level is less or equal to the current debug level.
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+ */
112132 static inline bool debug_level_enabled(debug_info_t *id, int level)
113133 {
114134 	return level <= id->level;
115135 }
116136 
137
+/**
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+ * debug_event() - writes binary debug entry to active debug area
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+ *		   (if level <= actual debug level)
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+ *
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+ * @id:		handle for debug log
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+ * @level:	debug level
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+ * @data:	pointer to data for debug entry
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+ * @length:	length of data in bytes
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ */
117150 static inline debug_entry_t *debug_event(debug_info_t *id, int level,
118151 					 void *data, int length)
119152 {
....@@ -122,6 +155,18 @@
122155 	return debug_event_common(id, level, data, length);
123156 }
124157 
158
+/**
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+ * debug_int_event() - writes unsigned integer debug entry to active debug area
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+ *		       (if level <= actual debug level)
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+ *
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+ * @id:		handle for debug log
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+ * @level:	debug level
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+ * @tag:	integer value for debug entry
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ */
125170 static inline debug_entry_t *debug_int_event(debug_info_t *id, int level,
126171 					     unsigned int tag)
127172 {
....@@ -132,6 +177,18 @@
132177 	return debug_event_common(id, level, &t, sizeof(unsigned int));
133178 }
134179 
180
+/**
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+ * debug_long_event() - writes unsigned long debug entry to active debug area
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+ *		       (if level <= actual debug level)
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+ *
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+ * @id:		handle for debug log
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+ * @level:	debug level
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+ * @tag:	long integer value for debug entry
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ */
135192 static inline debug_entry_t *debug_long_event(debug_info_t *id, int level,
136193 					      unsigned long tag)
137194 {
....@@ -142,6 +199,18 @@
142199 	return debug_event_common(id, level, &t, sizeof(unsigned long));
143200 }
144201 
202
+/**
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+ * debug_text_event() - writes string debug entry in ascii format to active
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+ *			debug area (if level <= actual debug level)
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+ *
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+ * @id:		handle for debug log
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+ * @level:	debug level
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+ * @txt:	string for debug entry
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ */
145214 static inline debug_entry_t *debug_text_event(debug_info_t *id, int level,
146215 					      const char *txt)
147216 {
....@@ -152,12 +221,28 @@
152221 
153222 /*
154223  * IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are
155
- * stored in the s390dbf. See Documentation/s390/s390dbf.txt for more details!
224
+ * stored in the s390dbf. See Documentation/s390/s390dbf.rst for more details!
156225  */
157226 extern debug_entry_t *
158227 __debug_sprintf_event(debug_info_t *id, int level, char *string, ...)
159228 	__attribute__ ((format(printf, 3, 4)));
160229 
230
+/**
231
+ * debug_sprintf_event() - writes debug entry with format string
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+ *			   and varargs (longs) to active debug area
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+ *			   (if level $<=$ actual debug level).
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+ *
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+ * @_id:	handle for debug log
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+ * @_level:	debug level
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+ * @_fmt:	format string for debug entry
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+ * @...:	varargs used as in sprintf()
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ *
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+ * floats and long long datatypes cannot be used as varargs.
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+ */
161246 #define debug_sprintf_event(_id, _level, _fmt, ...)			\
162247 ({									\
163248 	debug_entry_t *__ret;						\
....@@ -172,6 +257,20 @@
172257 	__ret;								\
173258 })
174259 
260
+/**
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+ * debug_exception() - writes binary debug entry to active debug area
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+ *		       (if level <= actual debug level)
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+ *		       and switches to next debug area
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+ *
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+ * @id:		handle for debug log
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+ * @level:	debug level
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+ * @data:	pointer to data for debug entry
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+ * @length:	length of data in bytes
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ */
175274 static inline debug_entry_t *debug_exception(debug_info_t *id, int level,
176275 					     void *data, int length)
177276 {
....@@ -180,6 +279,19 @@
180279 	return debug_exception_common(id, level, data, length);
181280 }
182281 
282
+/**
283
+ * debug_int_exception() - writes unsigned int debug entry to active debug area
284
+ *			   (if level <= actual debug level)
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+ *			   and switches to next debug area
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+ *
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+ * @id:		handle for debug log
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+ * @level:	debug level
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+ * @tag:	integer value for debug entry
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ */
183295 static inline debug_entry_t *debug_int_exception(debug_info_t *id, int level,
184296 						 unsigned int tag)
185297 {
....@@ -190,6 +302,19 @@
190302 	return debug_exception_common(id, level, &t, sizeof(unsigned int));
191303 }
192304 
305
+/**
306
+ * debug_long_exception() - writes long debug entry to active debug area
307
+ *			   (if level <= actual debug level)
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+ *			   and switches to next debug area
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+ *
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+ * @id:		handle for debug log
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+ * @level:	debug level
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+ * @tag:	long integer value for debug entry
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ */
193318 static inline debug_entry_t *debug_long_exception (debug_info_t *id, int level,
194319 						   unsigned long tag)
195320 {
....@@ -200,6 +325,20 @@
200325 	return debug_exception_common(id, level, &t, sizeof(unsigned long));
201326 }
202327 
328
+/**
329
+ * debug_text_exception() - writes string debug entry in ascii format to active
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+ *			    debug area (if level <= actual debug level)
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+ *			    and switches to next debug area
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+ * area
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+ *
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+ * @id:	handle for debug log
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+ * @level:	debug level
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+ * @txt:	string for debug entry
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ */
203342 static inline debug_entry_t *debug_text_exception(debug_info_t *id, int level,
204343 						  const char *txt)
205344 {
....@@ -210,12 +349,30 @@
210349 
211350 /*
212351  * IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are
213
- * stored in the s390dbf. See Documentation/s390/s390dbf.txt for more details!
352
+ * stored in the s390dbf. See Documentation/s390/s390dbf.rst for more details!
214353  */
215354 extern debug_entry_t *
216355 __debug_sprintf_exception(debug_info_t *id, int level, char *string, ...)
217356 	__attribute__ ((format(printf, 3, 4)));
218357 
358
+
359
+/**
360
+ * debug_sprintf_exception() - writes debug entry with format string and
361
+ *			       varargs (longs) to active debug area
362
+ *			       (if level <= actual debug level)
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+ *			       and switches to next debug area.
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+ *
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+ * @_id:	handle for debug log
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+ * @_level:	debug level
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+ * @_fmt:	format string for debug entry
368
+ * @...:	varargs used as in sprintf()
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+ *
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+ * Return:
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+ * - Address of written debug entry
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+ * - %NULL if error
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+ *
374
+ * floats and long long datatypes cannot be used as varargs.
375
+ */
219376 #define debug_sprintf_exception(_id, _level, _fmt, ...)			\
220377 ({									\
221378 	debug_entry_t *__ret;						\
....@@ -231,6 +388,7 @@
231388 })
232389 
233390 int debug_register_view(debug_info_t *id, struct debug_view *view);
391
+
234392 int debug_unregister_view(debug_info_t *id, struct debug_view *view);
235393 
236394 /*
....@@ -267,4 +425,4 @@
267425 #define PRINT_FATAL(x...)	printk(KERN_DEBUG PRINTK_HEADER x)
268426 #endif /* DASD_DEBUG */
269427 
270
-#endif /* DEBUG_H */
428
+#endif /* _ASM_S390_DEBUG_H */