drivers/gpu/drm/drm_print.c

   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 #define DEBUG /* for pr_debug() */
  27
  28 #include <stdarg.h>
  29 #include <linux/seq_file.h>
  30 #include <drm/drmP.h>
  31 #include <drm/drm_print.h>
  32
  33 void __drm_printfn_seq_file(struct drm_printer *p, struct va_format *vaf)
  34 {
  35         seq_printf(p->arg, "%pV", vaf);
  36 }
  37 EXPORT_SYMBOL(__drm_printfn_seq_file);
  38
  39 void __drm_printfn_info(struct drm_printer *p, struct va_format *vaf)
  40 {
  41         dev_info(p->arg, "[" DRM_NAME "] %pV", vaf);
  42 }
  43 EXPORT_SYMBOL(__drm_printfn_info);
  44
  45 void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf)
  46 {
  47         pr_debug("%s %pV", p->prefix, vaf);
  48 }
  49 EXPORT_SYMBOL(__drm_printfn_debug);
  50
  51 /**
  52  * drm_printf - print to a &drm_printer stream
  53  * @p: the &drm_printer
  54  * @f: format string
  55  */
  56 void drm_printf(struct drm_printer *p, const char *f, ...)
  57 {
  58         va_list args;
  59
  60         va_start(args, f);
  61         drm_vprintf(p, f, &args);
  62         va_end(args);
  63 }
  64 EXPORT_SYMBOL(drm_printf);
  65
  66 #define DRM_PRINTK_FMT "[" DRM_NAME ":%s]%s %pV"
  67
  68 void drm_dev_printk(const struct device *dev, const char *level,
  69                     unsigned int category, const char *function_name,
  70                     const char *prefix, const char *format, ...)
  71 {
  72         struct va_format vaf;
  73         va_list args;
  74
  75         if (category != DRM_UT_NONE && !(drm_debug & category))
  76                 return;
  77
  78         va_start(args, format);
  79         vaf.fmt = format;
  80         vaf.va = &args;
  81
  82         if (dev)
  83                 dev_printk(level, dev, DRM_PRINTK_FMT, function_name, prefix,
  84                            &vaf);
  85         else
  86                 printk("%s" DRM_PRINTK_FMT, level, function_name, prefix, &vaf);
  87
  88         va_end(args);
  89 }
  90 EXPORT_SYMBOL(drm_dev_printk);
  91
  92 void drm_printk(const char *level, unsigned int category,
  93                 const char *format, ...)
  94 {
  95         struct va_format vaf;
  96         va_list args;
  97
  98         if (category != DRM_UT_NONE && !(drm_debug & category))
  99                 return;
 100
 101         va_start(args, format);
 102         vaf.fmt = format;
 103         vaf.va = &args;
 104
 105         printk("%s" "[" DRM_NAME ":%ps]%s %pV",
 106                level, __builtin_return_address(0),
 107                strcmp(level, KERN_ERR) == 0 ? " *ERROR*" : "", &vaf);
 108
 109         va_end(args);
 110 }
 111 EXPORT_SYMBOL(drm_printk);