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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/i915/i915_utils.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_utils.c')
-rw-r--r-- | drivers/gpu/drm/i915/i915_utils.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_utils.c b/drivers/gpu/drm/i915/i915_utils.c new file mode 100644 index 0000000000..29fd02bf5e --- /dev/null +++ b/drivers/gpu/drm/i915/i915_utils.c @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2019 Intel Corporation + */ + +#include <linux/device.h> + +#include <drm/drm_drv.h> + +#include "i915_drv.h" +#include "i915_utils.h" + +#define FDO_BUG_MSG "Please file a bug on drm/i915; see " FDO_BUG_URL " for details." + +void +__i915_printk(struct drm_i915_private *dev_priv, const char *level, + const char *fmt, ...) +{ + static bool shown_bug_once; + struct device *kdev = dev_priv->drm.dev; + bool is_error = level[1] <= KERN_ERR[1]; + bool is_debug = level[1] == KERN_DEBUG[1]; + struct va_format vaf; + va_list args; + + if (is_debug && !drm_debug_enabled(DRM_UT_DRIVER)) + return; + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + if (is_error) + dev_printk(level, kdev, "%pV", &vaf); + else + dev_printk(level, kdev, "[" DRM_NAME ":%ps] %pV", + __builtin_return_address(0), &vaf); + + va_end(args); + + if (is_error && !shown_bug_once) { + /* + * Ask the user to file a bug report for the error, except + * if they may have caused the bug by fiddling with unsafe + * module parameters. + */ + if (!test_taint(TAINT_USER)) + dev_notice(kdev, "%s", FDO_BUG_MSG); + shown_bug_once = true; + } +} + +void add_taint_for_CI(struct drm_i915_private *i915, unsigned int taint) +{ + __i915_printk(i915, KERN_NOTICE, "CI tainted:%#x by %pS\n", + taint, (void *)_RET_IP_); + + /* Failures that occur during fault injection testing are expected */ + if (!i915_error_injected()) + __add_taint_for_CI(taint); +} + +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG) +static unsigned int i915_probe_fail_count; + +int __i915_inject_probe_error(struct drm_i915_private *i915, int err, + const char *func, int line) +{ + if (i915_probe_fail_count >= i915_modparams.inject_probe_failure) + return 0; + + if (++i915_probe_fail_count < i915_modparams.inject_probe_failure) + return 0; + + __i915_printk(i915, KERN_INFO, + "Injecting failure %d at checkpoint %u [%s:%d]\n", + err, i915_modparams.inject_probe_failure, func, line); + i915_modparams.inject_probe_failure = 0; + return err; +} + +bool i915_error_injected(void) +{ + return i915_probe_fail_count && !i915_modparams.inject_probe_failure; +} + +#endif + +void cancel_timer(struct timer_list *t) +{ + if (!timer_active(t)) + return; + + del_timer(t); + WRITE_ONCE(t->expires, 0); +} + +void set_timer_ms(struct timer_list *t, unsigned long timeout) +{ + if (!timeout) { + cancel_timer(t); + return; + } + + timeout = msecs_to_jiffies(timeout); + + /* + * Paranoia to make sure the compiler computes the timeout before + * loading 'jiffies' as jiffies is volatile and may be updated in + * the background by a timer tick. All to reduce the complexity + * of the addition and reduce the risk of losing a jiffie. + */ + barrier(); + + /* Keep t->expires = 0 reserved to indicate a canceled timer. */ + mod_timer(t, jiffies + timeout ?: 1); +} + +bool i915_vtd_active(struct drm_i915_private *i915) +{ + if (device_iommu_mapped(i915->drm.dev)) + return true; + + /* Running as a guest, we assume the host is enforcing VT'd */ + return i915_run_as_guest(); +} |