1 // SPDX-License-Identifier: MIT
3 * Copyright © 2019 Intel Corporation
6 #include <drm/drm_drv.h>
9 #include "i915_utils.h"
11 #define FDO_BUG_MSG "Please file a bug on drm/i915; see " FDO_BUG_URL " for details."
14 __i915_printk(struct drm_i915_private *dev_priv, const char *level,
17 static bool shown_bug_once;
18 struct device *kdev = dev_priv->drm.dev;
19 bool is_error = level[1] <= KERN_ERR[1];
20 bool is_debug = level[1] == KERN_DEBUG[1];
24 if (is_debug && !drm_debug_enabled(DRM_UT_DRIVER))
33 dev_printk(level, kdev, "%pV", &vaf);
35 dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV",
36 __builtin_return_address(0), &vaf);
40 if (is_error && !shown_bug_once) {
42 * Ask the user to file a bug report for the error, except
43 * if they may have caused the bug by fiddling with unsafe
46 if (!test_taint(TAINT_USER))
47 dev_notice(kdev, "%s", FDO_BUG_MSG);
48 shown_bug_once = true;
52 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
53 static unsigned int i915_probe_fail_count;
55 int __i915_inject_probe_error(struct drm_i915_private *i915, int err,
56 const char *func, int line)
58 if (i915_probe_fail_count >= i915_modparams.inject_probe_failure)
61 if (++i915_probe_fail_count < i915_modparams.inject_probe_failure)
64 __i915_printk(i915, KERN_INFO,
65 "Injecting failure %d at checkpoint %u [%s:%d]\n",
66 err, i915_modparams.inject_probe_failure, func, line);
67 i915_modparams.inject_probe_failure = 0;
71 bool i915_error_injected(void)
73 return i915_probe_fail_count && !i915_modparams.inject_probe_failure;
78 void cancel_timer(struct timer_list *t)
80 if (!READ_ONCE(t->expires))
84 WRITE_ONCE(t->expires, 0);
87 void set_timer_ms(struct timer_list *t, unsigned long timeout)
94 timeout = msecs_to_jiffies_timeout(timeout);
97 * Paranoia to make sure the compiler computes the timeout before
98 * loading 'jiffies' as jiffies is volatile and may be updated in
99 * the background by a timer tick. All to reduce the complexity
100 * of the addition and reduce the risk of losing a jiffie.
104 mod_timer(t, jiffies + timeout);