1 /*
2  * Copyright (C) 2016 Red Hat
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors:
23  * Rob Clark <robdclark@gmail.com>
24  */
25 
26 #ifndef DRM_PRINT_H_
27 #define DRM_PRINT_H_
28 
29 #include <linux/compiler.h>
30 #include <linux/printk.h>
31 #include <linux/seq_file.h>
32 #include <linux/device.h>
33 #include <linux/debugfs.h>
34 
35 #include <drm/drm.h>
36 
37 /* Do *not* use outside of drm_print.[ch]! */
38 extern unsigned int __drm_debug;
39 
40 /**
41  * DOC: print
42  *
43  * A simple wrapper for dev_printk(), seq_printf(), etc.  Allows same
44  * debug code to be used for both debugfs and printk logging.
45  *
46  * For example::
47  *
48  *     void log_some_info(struct drm_printer *p)
49  *     {
50  *             drm_printf(p, "foo=%d\n", foo);
51  *             drm_printf(p, "bar=%d\n", bar);
52  *     }
53  *
54  *     #ifdef CONFIG_DEBUG_FS
55  *     void debugfs_show(struct seq_file *f)
56  *     {
57  *             struct drm_printer p = drm_seq_file_printer(f);
58  *             log_some_info(&p);
59  *     }
60  *     #endif
61  *
62  *     void some_other_function(...)
63  *     {
64  *             struct drm_printer p = drm_info_printer(drm->dev);
65  *             log_some_info(&p);
66  *     }
67  */
68 
69 /**
70  * struct drm_printer - drm output "stream"
71  *
72  * Do not use struct members directly.  Use drm_printer_seq_file(),
73  * drm_printer_info(), etc to initialize.  And drm_printf() for output.
74  */
75 struct drm_printer {
76 	/* private: */
77 	void (*printfn)(struct drm_printer *p, struct va_format *vaf);
78 	void (*puts)(struct drm_printer *p, const char *str);
79 	void *arg;
80 	const char *prefix;
81 };
82 
83 void __drm_printfn_coredump(struct drm_printer *p, struct va_format *vaf);
84 void __drm_puts_coredump(struct drm_printer *p, const char *str);
85 void __drm_printfn_seq_file(struct drm_printer *p, struct va_format *vaf);
86 void __drm_puts_seq_file(struct drm_printer *p, const char *str);
87 void __drm_printfn_info(struct drm_printer *p, struct va_format *vaf);
88 void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf);
89 void __drm_printfn_err(struct drm_printer *p, struct va_format *vaf);
90 
91 __printf(2, 3)
92 void drm_printf(struct drm_printer *p, const char *f, ...);
93 void drm_puts(struct drm_printer *p, const char *str);
94 void drm_print_regset32(struct drm_printer *p, struct debugfs_regset32 *regset);
95 void drm_print_bits(struct drm_printer *p, unsigned long value,
96 		    const char * const bits[], unsigned int nbits);
97 
98 __printf(2, 0)
99 /**
100  * drm_vprintf - print to a &drm_printer stream
101  * @p: the &drm_printer
102  * @fmt: format string
103  * @va: the va_list
104  */
105 static inline void
drm_vprintf(struct drm_printer * p,const char * fmt,va_list * va)106 drm_vprintf(struct drm_printer *p, const char *fmt, va_list *va)
107 {
108 	struct va_format vaf = { .fmt = fmt, .va = va };
109 
110 	p->printfn(p, &vaf);
111 }
112 
113 /**
114  * drm_printf_indent - Print to a &drm_printer stream with indentation
115  * @printer: DRM printer
116  * @indent: Tab indentation level (max 5)
117  * @fmt: Format string
118  */
119 #define drm_printf_indent(printer, indent, fmt, ...) \
120 	drm_printf((printer), "%.*s" fmt, (indent), "\t\t\t\t\tX", ##__VA_ARGS__)
121 
122 /**
123  * struct drm_print_iterator - local struct used with drm_printer_coredump
124  * @data: Pointer to the devcoredump output buffer
125  * @start: The offset within the buffer to start writing
126  * @remain: The number of bytes to write for this iteration
127  */
128 struct drm_print_iterator {
129 	void *data;
130 	ssize_t start;
131 	ssize_t remain;
132 	/* private: */
133 	ssize_t offset;
134 };
135 
136 /**
137  * drm_coredump_printer - construct a &drm_printer that can output to a buffer
138  * from the read function for devcoredump
139  * @iter: A pointer to a struct drm_print_iterator for the read instance
140  *
141  * This wrapper extends drm_printf() to work with a dev_coredumpm() callback
142  * function. The passed in drm_print_iterator struct contains the buffer
143  * pointer, size and offset as passed in from devcoredump.
144  *
145  * For example::
146  *
147  *	void coredump_read(char *buffer, loff_t offset, size_t count,
148  *		void *data, size_t datalen)
149  *	{
150  *		struct drm_print_iterator iter;
151  *		struct drm_printer p;
152  *
153  *		iter.data = buffer;
154  *		iter.start = offset;
155  *		iter.remain = count;
156  *
157  *		p = drm_coredump_printer(&iter);
158  *
159  *		drm_printf(p, "foo=%d\n", foo);
160  *	}
161  *
162  *	void makecoredump(...)
163  *	{
164  *		...
165  *		dev_coredumpm(dev, THIS_MODULE, data, 0, GFP_KERNEL,
166  *			coredump_read, ...)
167  *	}
168  *
169  * RETURNS:
170  * The &drm_printer object
171  */
172 static inline struct drm_printer
drm_coredump_printer(struct drm_print_iterator * iter)173 drm_coredump_printer(struct drm_print_iterator *iter)
174 {
175 	struct drm_printer p = {
176 		.printfn = __drm_printfn_coredump,
177 		.puts = __drm_puts_coredump,
178 		.arg = iter,
179 	};
180 
181 	/* Set the internal offset of the iterator to zero */
182 	iter->offset = 0;
183 
184 	return p;
185 }
186 
187 /**
188  * drm_seq_file_printer - construct a &drm_printer that outputs to &seq_file
189  * @f:  the &struct seq_file to output to
190  *
191  * RETURNS:
192  * The &drm_printer object
193  */
drm_seq_file_printer(struct seq_file * f)194 static inline struct drm_printer drm_seq_file_printer(struct seq_file *f)
195 {
196 	struct drm_printer p = {
197 		.printfn = __drm_printfn_seq_file,
198 		.puts = __drm_puts_seq_file,
199 		.arg = f,
200 	};
201 	return p;
202 }
203 
204 /**
205  * drm_info_printer - construct a &drm_printer that outputs to dev_printk()
206  * @dev: the &struct device pointer
207  *
208  * RETURNS:
209  * The &drm_printer object
210  */
drm_info_printer(struct device * dev)211 static inline struct drm_printer drm_info_printer(struct device *dev)
212 {
213 	struct drm_printer p = {
214 		.printfn = __drm_printfn_info,
215 		.arg = dev,
216 	};
217 	return p;
218 }
219 
220 /**
221  * drm_debug_printer - construct a &drm_printer that outputs to pr_debug()
222  * @prefix: debug output prefix
223  *
224  * RETURNS:
225  * The &drm_printer object
226  */
drm_debug_printer(const char * prefix)227 static inline struct drm_printer drm_debug_printer(const char *prefix)
228 {
229 	struct drm_printer p = {
230 		.printfn = __drm_printfn_debug,
231 		.prefix = prefix
232 	};
233 	return p;
234 }
235 
236 /**
237  * drm_err_printer - construct a &drm_printer that outputs to pr_err()
238  * @prefix: debug output prefix
239  *
240  * RETURNS:
241  * The &drm_printer object
242  */
drm_err_printer(const char * prefix)243 static inline struct drm_printer drm_err_printer(const char *prefix)
244 {
245 	struct drm_printer p = {
246 		.printfn = __drm_printfn_err,
247 		.prefix = prefix
248 	};
249 	return p;
250 }
251 
252 /**
253  * enum drm_debug_category - The DRM debug categories
254  *
255  * Each of the DRM debug logging macros use a specific category, and the logging
256  * is filtered by the drm.debug module parameter. This enum specifies the values
257  * for the interface.
258  *
259  * Each DRM_DEBUG_<CATEGORY> macro logs to DRM_UT_<CATEGORY> category, except
260  * DRM_DEBUG() logs to DRM_UT_CORE.
261  *
262  * Enabling verbose debug messages is done through the drm.debug parameter, each
263  * category being enabled by a bit:
264  *
265  *  - drm.debug=0x1 will enable CORE messages
266  *  - drm.debug=0x2 will enable DRIVER messages
267  *  - drm.debug=0x3 will enable CORE and DRIVER messages
268  *  - ...
269  *  - drm.debug=0x1ff will enable all messages
270  *
271  * An interesting feature is that it's possible to enable verbose logging at
272  * run-time by echoing the debug value in its sysfs node::
273  *
274  *   # echo 0xf > /sys/module/drm/parameters/debug
275  *
276  */
277 enum drm_debug_category {
278 	/**
279 	 * @DRM_UT_CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c,
280 	 * drm_memory.c, ...
281 	 */
282 	DRM_UT_CORE		= 0x01,
283 	/**
284 	 * @DRM_UT_DRIVER: Used in the vendor specific part of the driver: i915,
285 	 * radeon, ... macro.
286 	 */
287 	DRM_UT_DRIVER		= 0x02,
288 	/**
289 	 * @DRM_UT_KMS: Used in the modesetting code.
290 	 */
291 	DRM_UT_KMS		= 0x04,
292 	/**
293 	 * @DRM_UT_PRIME: Used in the prime code.
294 	 */
295 	DRM_UT_PRIME		= 0x08,
296 	/**
297 	 * @DRM_UT_ATOMIC: Used in the atomic code.
298 	 */
299 	DRM_UT_ATOMIC		= 0x10,
300 	/**
301 	 * @DRM_UT_VBL: Used for verbose debug message in the vblank code.
302 	 */
303 	DRM_UT_VBL		= 0x20,
304 	/**
305 	 * @DRM_UT_STATE: Used for verbose atomic state debugging.
306 	 */
307 	DRM_UT_STATE		= 0x40,
308 	/**
309 	 * @DRM_UT_LEASE: Used in the lease code.
310 	 */
311 	DRM_UT_LEASE		= 0x80,
312 	/**
313 	 * @DRM_UT_DP: Used in the DP code.
314 	 */
315 	DRM_UT_DP		= 0x100,
316 	/**
317 	 * @DRM_UT_DRMRES: Used in the drm managed resources code.
318 	 */
319 	DRM_UT_DRMRES		= 0x200,
320 };
321 
drm_debug_enabled(enum drm_debug_category category)322 static inline bool drm_debug_enabled(enum drm_debug_category category)
323 {
324 	return unlikely(__drm_debug & category);
325 }
326 
327 /*
328  * struct device based logging
329  *
330  * Prefer drm_device based logging over device or printk based logging.
331  */
332 
333 __printf(3, 4)
334 void drm_dev_printk(const struct device *dev, const char *level,
335 		    const char *format, ...);
336 __printf(3, 4)
337 void drm_dev_dbg(const struct device *dev, enum drm_debug_category category,
338 		 const char *format, ...);
339 
340 /**
341  * DRM_DEV_ERROR() - Error output.
342  *
343  * NOTE: this is deprecated in favor of drm_err() or dev_err().
344  *
345  * @dev: device pointer
346  * @fmt: printf() like format string.
347  */
348 #define DRM_DEV_ERROR(dev, fmt, ...)					\
349 	drm_dev_printk(dev, KERN_ERR, "*ERROR* " fmt, ##__VA_ARGS__)
350 
351 /**
352  * DRM_DEV_ERROR_RATELIMITED() - Rate limited error output.
353  *
354  * NOTE: this is deprecated in favor of drm_err_ratelimited() or
355  * dev_err_ratelimited().
356  *
357  * @dev: device pointer
358  * @fmt: printf() like format string.
359  *
360  * Like DRM_ERROR() but won't flood the log.
361  */
362 #define DRM_DEV_ERROR_RATELIMITED(dev, fmt, ...)			\
363 ({									\
364 	static DEFINE_RATELIMIT_STATE(_rs,				\
365 				      DEFAULT_RATELIMIT_INTERVAL,	\
366 				      DEFAULT_RATELIMIT_BURST);		\
367 									\
368 	if (__ratelimit(&_rs))						\
369 		DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__);			\
370 })
371 
372 /* NOTE: this is deprecated in favor of drm_info() or dev_info(). */
373 #define DRM_DEV_INFO(dev, fmt, ...)				\
374 	drm_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
375 
376 /* NOTE: this is deprecated in favor of drm_info_once() or dev_info_once(). */
377 #define DRM_DEV_INFO_ONCE(dev, fmt, ...)				\
378 ({									\
379 	static bool __print_once __read_mostly;				\
380 	if (!__print_once) {						\
381 		__print_once = true;					\
382 		DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__);			\
383 	}								\
384 })
385 
386 /**
387  * DRM_DEV_DEBUG() - Debug output for generic drm code
388  *
389  * NOTE: this is deprecated in favor of drm_dbg_core().
390  *
391  * @dev: device pointer
392  * @fmt: printf() like format string.
393  */
394 #define DRM_DEV_DEBUG(dev, fmt, ...)					\
395 	drm_dev_dbg(dev, DRM_UT_CORE, fmt, ##__VA_ARGS__)
396 /**
397  * DRM_DEV_DEBUG_DRIVER() - Debug output for vendor specific part of the driver
398  *
399  * NOTE: this is deprecated in favor of drm_dbg() or dev_dbg().
400  *
401  * @dev: device pointer
402  * @fmt: printf() like format string.
403  */
404 #define DRM_DEV_DEBUG_DRIVER(dev, fmt, ...)				\
405 	drm_dev_dbg(dev, DRM_UT_DRIVER,	fmt, ##__VA_ARGS__)
406 /**
407  * DRM_DEV_DEBUG_KMS() - Debug output for modesetting code
408  *
409  * NOTE: this is deprecated in favor of drm_dbg_kms().
410  *
411  * @dev: device pointer
412  * @fmt: printf() like format string.
413  */
414 #define DRM_DEV_DEBUG_KMS(dev, fmt, ...)				\
415 	drm_dev_dbg(dev, DRM_UT_KMS, fmt, ##__VA_ARGS__)
416 
417 /*
418  * struct drm_device based logging
419  *
420  * Prefer drm_device based logging over device or prink based logging.
421  */
422 
423 /* Helper for struct drm_device based logging. */
424 #define __drm_printk(drm, level, type, fmt, ...)			\
425 	dev_##level##type((drm)->dev, "[drm] " fmt, ##__VA_ARGS__)
426 
427 
428 #define drm_info(drm, fmt, ...)					\
429 	__drm_printk((drm), info,, fmt, ##__VA_ARGS__)
430 
431 #define drm_notice(drm, fmt, ...)				\
432 	__drm_printk((drm), notice,, fmt, ##__VA_ARGS__)
433 
434 #define drm_warn(drm, fmt, ...)					\
435 	__drm_printk((drm), warn,, fmt, ##__VA_ARGS__)
436 
437 #define drm_err(drm, fmt, ...)					\
438 	__drm_printk((drm), err,, "*ERROR* " fmt, ##__VA_ARGS__)
439 
440 
441 #define drm_info_once(drm, fmt, ...)				\
442 	__drm_printk((drm), info, _once, fmt, ##__VA_ARGS__)
443 
444 #define drm_notice_once(drm, fmt, ...)				\
445 	__drm_printk((drm), notice, _once, fmt, ##__VA_ARGS__)
446 
447 #define drm_warn_once(drm, fmt, ...)				\
448 	__drm_printk((drm), warn, _once, fmt, ##__VA_ARGS__)
449 
450 #define drm_err_once(drm, fmt, ...)				\
451 	__drm_printk((drm), err, _once, "*ERROR* " fmt, ##__VA_ARGS__)
452 
453 
454 #define drm_err_ratelimited(drm, fmt, ...)				\
455 	__drm_printk((drm), err, _ratelimited, "*ERROR* " fmt, ##__VA_ARGS__)
456 
457 
458 #define drm_dbg_core(drm, fmt, ...)					\
459 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_CORE, fmt, ##__VA_ARGS__)
460 #define drm_dbg(drm, fmt, ...)						\
461 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
462 #define drm_dbg_kms(drm, fmt, ...)					\
463 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_KMS, fmt, ##__VA_ARGS__)
464 #define drm_dbg_prime(drm, fmt, ...)					\
465 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
466 #define drm_dbg_atomic(drm, fmt, ...)					\
467 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
468 #define drm_dbg_vbl(drm, fmt, ...)					\
469 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_VBL, fmt, ##__VA_ARGS__)
470 #define drm_dbg_state(drm, fmt, ...)					\
471 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_STATE, fmt, ##__VA_ARGS__)
472 #define drm_dbg_lease(drm, fmt, ...)					\
473 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_LEASE, fmt, ##__VA_ARGS__)
474 #define drm_dbg_dp(drm, fmt, ...)					\
475 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DP, fmt, ##__VA_ARGS__)
476 #define drm_dbg_drmres(drm, fmt, ...)					\
477 	drm_dev_dbg((drm) ? (drm)->dev : NULL, DRM_UT_DRMRES, fmt, ##__VA_ARGS__)
478 
479 
480 /*
481  * printk based logging
482  *
483  * Prefer drm_device based logging over device or prink based logging.
484  */
485 
486 __printf(2, 3)
487 void __drm_dbg(enum drm_debug_category category, const char *format, ...);
488 __printf(1, 2)
489 void __drm_err(const char *format, ...);
490 
491 /* Macros to make printk easier */
492 
493 #define _DRM_PRINTK(once, level, fmt, ...)				\
494 	printk##once(KERN_##level "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
495 
496 /* NOTE: this is deprecated in favor of pr_info(). */
497 #define DRM_INFO(fmt, ...)						\
498 	_DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
499 /* NOTE: this is deprecated in favor of pr_notice(). */
500 #define DRM_NOTE(fmt, ...)						\
501 	_DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
502 /* NOTE: this is deprecated in favor of pr_warn(). */
503 #define DRM_WARN(fmt, ...)						\
504 	_DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
505 
506 /* NOTE: this is deprecated in favor of pr_info_once(). */
507 #define DRM_INFO_ONCE(fmt, ...)						\
508 	_DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
509 /* NOTE: this is deprecated in favor of pr_notice_once(). */
510 #define DRM_NOTE_ONCE(fmt, ...)						\
511 	_DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
512 /* NOTE: this is deprecated in favor of pr_warn_once(). */
513 #define DRM_WARN_ONCE(fmt, ...)						\
514 	_DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
515 
516 /* NOTE: this is deprecated in favor of pr_err(). */
517 #define DRM_ERROR(fmt, ...)						\
518 	__drm_err(fmt, ##__VA_ARGS__)
519 
520 /* NOTE: this is deprecated in favor of pr_err_ratelimited(). */
521 #define DRM_ERROR_RATELIMITED(fmt, ...)					\
522 	DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
523 
524 /* NOTE: this is deprecated in favor of drm_dbg_core(NULL, ...). */
525 #define DRM_DEBUG(fmt, ...)						\
526 	__drm_dbg(DRM_UT_CORE, fmt, ##__VA_ARGS__)
527 
528 /* NOTE: this is deprecated in favor of drm_dbg(NULL, ...). */
529 #define DRM_DEBUG_DRIVER(fmt, ...)					\
530 	__drm_dbg(DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
531 
532 /* NOTE: this is deprecated in favor of drm_dbg_kms(NULL, ...). */
533 #define DRM_DEBUG_KMS(fmt, ...)						\
534 	__drm_dbg(DRM_UT_KMS, fmt, ##__VA_ARGS__)
535 
536 /* NOTE: this is deprecated in favor of drm_dbg_prime(NULL, ...). */
537 #define DRM_DEBUG_PRIME(fmt, ...)					\
538 	__drm_dbg(DRM_UT_PRIME, fmt, ##__VA_ARGS__)
539 
540 /* NOTE: this is deprecated in favor of drm_dbg_atomic(NULL, ...). */
541 #define DRM_DEBUG_ATOMIC(fmt, ...)					\
542 	__drm_dbg(DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
543 
544 /* NOTE: this is deprecated in favor of drm_dbg_vbl(NULL, ...). */
545 #define DRM_DEBUG_VBL(fmt, ...)						\
546 	__drm_dbg(DRM_UT_VBL, fmt, ##__VA_ARGS__)
547 
548 /* NOTE: this is deprecated in favor of drm_dbg_lease(NULL, ...). */
549 #define DRM_DEBUG_LEASE(fmt, ...)					\
550 	__drm_dbg(DRM_UT_LEASE, fmt, ##__VA_ARGS__)
551 
552 /* NOTE: this is deprecated in favor of drm_dbg_dp(NULL, ...). */
553 #define DRM_DEBUG_DP(fmt, ...)						\
554 	__drm_dbg(DRM_UT_DP, fmt, ## __VA_ARGS__)
555 
556 #define __DRM_DEFINE_DBG_RATELIMITED(category, drm, fmt, ...)					\
557 ({												\
558 	static DEFINE_RATELIMIT_STATE(rs_, DEFAULT_RATELIMIT_INTERVAL, DEFAULT_RATELIMIT_BURST);\
559 	const struct drm_device *drm_ = (drm);							\
560 												\
561 	if (drm_debug_enabled(DRM_UT_ ## category) && __ratelimit(&rs_))			\
562 		drm_dev_printk(drm_ ? drm_->dev : NULL, KERN_DEBUG, fmt, ## __VA_ARGS__);	\
563 })
564 
565 #define drm_dbg_kms_ratelimited(drm, fmt, ...) \
566 	__DRM_DEFINE_DBG_RATELIMITED(KMS, drm, fmt, ## __VA_ARGS__)
567 
568 /* NOTE: this is deprecated in favor of drm_dbg_kms_ratelimited(NULL, ...). */
569 #define DRM_DEBUG_KMS_RATELIMITED(fmt, ...) drm_dbg_kms_ratelimited(NULL, fmt, ## __VA_ARGS__)
570 
571 /*
572  * struct drm_device based WARNs
573  *
574  * drm_WARN*() acts like WARN*(), but with the key difference of
575  * using device specific information so that we know from which device
576  * warning is originating from.
577  *
578  * Prefer drm_device based drm_WARN* over regular WARN*
579  */
580 
581 /* Helper for struct drm_device based WARNs */
582 #define drm_WARN(drm, condition, format, arg...)			\
583 	WARN(condition, "%s %s: " format,				\
584 			dev_driver_string((drm)->dev),			\
585 			dev_name((drm)->dev), ## arg)
586 
587 #define drm_WARN_ONCE(drm, condition, format, arg...)			\
588 	WARN_ONCE(condition, "%s %s: " format,				\
589 			dev_driver_string((drm)->dev),			\
590 			dev_name((drm)->dev), ## arg)
591 
592 #define drm_WARN_ON(drm, x)						\
593 	drm_WARN((drm), (x), "%s",					\
594 		 "drm_WARN_ON(" __stringify(x) ")")
595 
596 #define drm_WARN_ON_ONCE(drm, x)					\
597 	drm_WARN_ONCE((drm), (x), "%s",					\
598 		      "drm_WARN_ON_ONCE(" __stringify(x) ")")
599 
600 #endif /* DRM_PRINT_H_ */
601