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drm/i915: Make i915 events part of uapi
Make the uevent strings part of the user API for people who wish to write their own listeners. v2: Make a space in the string concatenation. (Chad) Use the "UEVENT" suffix intead of "EVENT" (Chad) Make kernel-doc parseable Docbook comments (Daniel) v3: Undid reset change introduced in last submission (Daniel) Fixed up comments to address removal changes. Thanks to Daniel Vetter for a majority of the parity error comments. CC: Chad Versace <chad.versace@linux.intel.com> Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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2 changed files with 28 additions and 4 deletions
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@ -812,7 +812,7 @@ static void ivybridge_parity_work(struct work_struct *work)
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mutex_unlock(&dev_priv->dev->struct_mutex);
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mutex_unlock(&dev_priv->dev->struct_mutex);
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parity_event[0] = "L3_PARITY_ERROR=1";
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parity_event[0] = I915_L3_PARITY_UEVENT "=1";
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parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
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parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
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parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
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parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
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parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
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parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
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@ -1402,9 +1402,9 @@ static void i915_error_work_func(struct work_struct *work)
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gpu_error);
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gpu_error);
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struct drm_device *dev = dev_priv->dev;
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struct drm_device *dev = dev_priv->dev;
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struct intel_ring_buffer *ring;
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struct intel_ring_buffer *ring;
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char *error_event[] = { "ERROR=1", NULL };
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char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
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char *reset_event[] = { "RESET=1", NULL };
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char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
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char *reset_done_event[] = { "ERROR=0", NULL };
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char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
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int i, ret;
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int i, ret;
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kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
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kobject_uevent_env(&dev->primary->kdev.kobj, KOBJ_CHANGE, error_event);
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@ -33,6 +33,30 @@
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* subject to backwards-compatibility constraints.
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* subject to backwards-compatibility constraints.
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*/
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*/
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/**
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* DOC: uevents generated by i915 on it's device node
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*
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* I915_L3_PARITY_UEVENT - Generated when the driver receives a parity mismatch
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* event from the gpu l3 cache. Additional information supplied is ROW,
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* BANK, SUBBANK of the affected cacheline. Userspace should keep track of
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* these events and if a specific cache-line seems to have a persistent
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* error remap it with the l3 remapping tool supplied in intel-gpu-tools.
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* The value supplied with the event is always 1.
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*
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* I915_ERROR_UEVENT - Generated upon error detection, currently only via
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* hangcheck. The error detection event is a good indicator of when things
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* began to go badly. The value supplied with the event is a 1 upon error
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* detection, and a 0 upon reset completion, signifying no more error
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* exists. NOTE: Disabling hangcheck or reset via module parameter will
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* cause the related events to not be seen.
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*
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* I915_RESET_UEVENT - Event is generated just before an attempt to reset the
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* the GPU. The value supplied with the event is always 1. NOTE: Disable
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* reset via module parameter will cause this event to not be seen.
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*/
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#define I915_L3_PARITY_UEVENT "L3_PARITY_ERROR"
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#define I915_ERROR_UEVENT "ERROR"
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#define I915_RESET_UEVENT "RESET"
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/* Each region is a minimum of 16k, and there are at most 255 of them.
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/* Each region is a minimum of 16k, and there are at most 255 of them.
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*/
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*/
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