drivers/gpu/drm/i915/i915

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This source file includes following definitions.
__i915_printk
__i915_inject_load_error
i915_error_injected
   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright © 2019 Intel Corporation
   4  */
   5 
   6 #include <drm/drm_drv.h>
   7 
   8 #include "i915_drv.h"
   9 #include "i915_utils.h"
  10 
  11 #define FDO_BUG_URL "https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs"
  12 #define FDO_BUG_MSG "Please file a bug on drm/i915; see " FDO_BUG_URL " for details."
  13 
  14 void
  15 __i915_printk(struct drm_i915_private *dev_priv, const char *level,
  16               const char *fmt, ...)
  17 {
  18         static bool shown_bug_once;
  19         struct device *kdev = dev_priv->drm.dev;
  20         bool is_error = level[1] <= KERN_ERR[1];
  21         bool is_debug = level[1] == KERN_DEBUG[1];
  22         struct va_format vaf;
  23         va_list args;
  24 
  25         if (is_debug && !(drm_debug & DRM_UT_DRIVER))
  26                 return;
  27 
  28         va_start(args, fmt);
  29 
  30         vaf.fmt = fmt;
  31         vaf.va = &args;
  32 
  33         if (is_error)
  34                 dev_printk(level, kdev, "%pV", &vaf);
  35         else
  36                 dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",
  37                            __builtin_return_address(0), &vaf);
  38 
  39         va_end(args);
  40 
  41         if (is_error && !shown_bug_once) {
  42                 /*
  43                  * Ask the user to file a bug report for the error, except
  44                  * if they may have caused the bug by fiddling with unsafe
  45                  * module parameters.
  46                  */
  47                 if (!test_taint(TAINT_USER))
  48                         dev_notice(kdev, "%s", FDO_BUG_MSG);
  49                 shown_bug_once = true;
  50         }
  51 }
  52 
  53 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
  54 static unsigned int i915_probe_fail_count;
  55 
  56 int __i915_inject_load_error(struct drm_i915_private *i915, int err,
  57                              const char *func, int line)
  58 {
  59         if (i915_probe_fail_count >= i915_modparams.inject_load_failure)
  60                 return 0;
  61 
  62         if (++i915_probe_fail_count < i915_modparams.inject_load_failure)
  63                 return 0;
  64 
  65         __i915_printk(i915, KERN_INFO,
  66                       "Injecting failure %d at checkpoint %u [%s:%d]\n",
  67                       err, i915_modparams.inject_load_failure, func, line);
  68         i915_modparams.inject_load_failure = 0;
  69         return err;
  70 }
  71 
  72 bool i915_error_injected(void)
  73 {
  74         return i915_probe_fail_count && !i915_modparams.inject_load_failure;
  75 }
  76 
  77 #endif
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/gpu/drm/i915/i915_utils.c

DEFINITIONS
