Commit 5311f517 authored by Michał Winiarski's avatar Michał Winiarski Committed by Chris Wilson

drm/i915: Define explicit wedged on init reset state

We're currently using scratch presence as a way of identifying that we
entered wedged state at driver initialization time.
Let's use a separate flag rather than rely on scratch.
Signed-off-by: default avatarMichał Winiarski <michal.winiarski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190926133142.2838-1-chris@chris-wilson.co.uk
parent 45d3c5cd
...@@ -811,7 +811,8 @@ static bool __intel_gt_unset_wedged(struct intel_gt *gt) ...@@ -811,7 +811,8 @@ static bool __intel_gt_unset_wedged(struct intel_gt *gt)
if (!test_bit(I915_WEDGED, &gt->reset.flags)) if (!test_bit(I915_WEDGED, &gt->reset.flags))
return true; return true;
if (!gt->scratch) /* Never full initialised, recovery impossible */ /* Never fully initialised, recovery impossible */
if (test_bit(I915_WEDGED_ON_INIT, &gt->reset.flags))
return false; return false;
GEM_TRACE("start\n"); GEM_TRACE("start\n");
...@@ -1279,6 +1280,14 @@ int intel_gt_terminally_wedged(struct intel_gt *gt) ...@@ -1279,6 +1280,14 @@ int intel_gt_terminally_wedged(struct intel_gt *gt)
return intel_gt_is_wedged(gt) ? -EIO : 0; return intel_gt_is_wedged(gt) ? -EIO : 0;
} }
void intel_gt_set_wedged_on_init(struct intel_gt *gt)
{
BUILD_BUG_ON(I915_RESET_ENGINE + I915_NUM_ENGINES >
I915_WEDGED_ON_INIT);
intel_gt_set_wedged(gt);
set_bit(I915_WEDGED_ON_INIT, &gt->reset.flags);
}
void intel_gt_init_reset(struct intel_gt *gt) void intel_gt_init_reset(struct intel_gt *gt)
{ {
init_waitqueue_head(&gt->reset.queue); init_waitqueue_head(&gt->reset.queue);
......
...@@ -45,6 +45,12 @@ void intel_gt_set_wedged(struct intel_gt *gt); ...@@ -45,6 +45,12 @@ void intel_gt_set_wedged(struct intel_gt *gt);
bool intel_gt_unset_wedged(struct intel_gt *gt); bool intel_gt_unset_wedged(struct intel_gt *gt);
int intel_gt_terminally_wedged(struct intel_gt *gt); int intel_gt_terminally_wedged(struct intel_gt *gt);
/*
* There's no unset_wedged_on_init paired with this one.
* Once we're wedged on init, there's no going back.
*/
void intel_gt_set_wedged_on_init(struct intel_gt *gt);
int __intel_gt_reset(struct intel_gt *gt, intel_engine_mask_t engine_mask); int __intel_gt_reset(struct intel_gt *gt, intel_engine_mask_t engine_mask);
int intel_reset_guc(struct intel_gt *gt); int intel_reset_guc(struct intel_gt *gt);
...@@ -68,6 +74,9 @@ void __intel_fini_wedge(struct intel_wedge_me *w); ...@@ -68,6 +74,9 @@ void __intel_fini_wedge(struct intel_wedge_me *w);
static inline bool __intel_reset_failed(const struct intel_reset *reset) static inline bool __intel_reset_failed(const struct intel_reset *reset)
{ {
GEM_BUG_ON(test_bit(I915_WEDGED_ON_INIT, &reset->flags) ?
!test_bit(I915_WEDGED, &reset->flags) : false);
return unlikely(test_bit(I915_WEDGED, &reset->flags)); return unlikely(test_bit(I915_WEDGED, &reset->flags));
} }
......
...@@ -29,11 +29,17 @@ struct intel_reset { ...@@ -29,11 +29,17 @@ struct intel_reset {
* we set the #I915_WEDGED bit. Prior to command submission, e.g. * we set the #I915_WEDGED bit. Prior to command submission, e.g.
* i915_request_alloc(), this bit is checked and the sequence * i915_request_alloc(), this bit is checked and the sequence
* aborted (with -EIO reported to userspace) if set. * aborted (with -EIO reported to userspace) if set.
*
* #I915_WEDGED_ON_INIT - If we fail to initialize the GPU we can no
* longer use the GPU - similar to #I915_WEDGED bit. The difference in
* in the way we're handling "forced" unwedged (e.g. through debugfs),
* which is not allowed in case we failed to initialize.
*/ */
unsigned long flags; unsigned long flags;
#define I915_RESET_BACKOFF 0 #define I915_RESET_BACKOFF 0
#define I915_RESET_MODESET 1 #define I915_RESET_MODESET 1
#define I915_RESET_ENGINE 2 #define I915_RESET_ENGINE 2
#define I915_WEDGED_ON_INIT (BITS_PER_LONG - 2)
#define I915_WEDGED (BITS_PER_LONG - 1) #define I915_WEDGED (BITS_PER_LONG - 1)
struct mutex mutex; /* serialises wedging/unwedging */ struct mutex mutex; /* serialises wedging/unwedging */
......
...@@ -1411,7 +1411,7 @@ int i915_gem_init(struct drm_i915_private *dev_priv) ...@@ -1411,7 +1411,7 @@ int i915_gem_init(struct drm_i915_private *dev_priv)
err_gt: err_gt:
mutex_unlock(&dev_priv->drm.struct_mutex); mutex_unlock(&dev_priv->drm.struct_mutex);
intel_gt_set_wedged(&dev_priv->gt); intel_gt_set_wedged_on_init(&dev_priv->gt);
i915_gem_suspend(dev_priv); i915_gem_suspend(dev_priv);
i915_gem_suspend_late(dev_priv); i915_gem_suspend_late(dev_priv);
......
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