diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-05-13 11:57:22 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-05-13 12:39:20 +0100 |
| commit | e075a32f515becef66dc849f5eca47409ccf5473 (patch) | |
| tree | 47e4a791111cbc6385ce3d0e0bf5b6a9ce23df23 | |
| parent | e6db7469081d13700e12ae6b128091ca8eeffc3f (diff) | |
drm/i915: Stop automatically retiring requests after a GPU hang
Following a GPU hang, we break out of the request loop in order to
unlock the struct_mutex for use by the GPU reset. However, if we retire
all the requests at that moment, we cannot identify the guilty request
after performing the reset.
v2: Not automatically retiring requests forces us to recheck for
available ringspace.
Fixes: f4457ae71fd6 ("drm/i915: Prevent leaking of -EIO from i915_wait_request()")
Testcase: igt/gem_reset_stats/ban-*
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Tested-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1463137042-9669-4-git-send-email-chris@chris-wilson.co.uk
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 2 |
2 files changed, 8 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 474c0272e73d..b1a33fe95ab3 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1462,7 +1462,10 @@ i915_wait_request(struct drm_i915_gem_request *req) if (ret) return ret; - __i915_gem_request_retire__upto(req); + /* If the GPU hung, we want to keep the requests to find the guilty. */ + if (req->reset_counter == i915_reset_counter(&dev_priv->gpu_error)) + __i915_gem_request_retire__upto(req); + return 0; } @@ -1519,7 +1522,8 @@ i915_gem_object_retire_request(struct drm_i915_gem_object *obj, else if (obj->last_write_req == req) i915_gem_object_retire__write(obj); - __i915_gem_request_retire__upto(req); + if (req->reset_counter == i915_reset_counter(&req->i915->gpu_error)) + __i915_gem_request_retire__upto(req); } /* A nonblocking variant of the above wait. This is a highly dangerous routine diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 0618dd34c3ec..8d35a3978f9b 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -2450,6 +2450,8 @@ int intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords) return ret; intel_ring_update_space(ringbuf); + if (unlikely(ringbuf->space < wait_bytes)) + return -EAGAIN; } if (unlikely(need_wrap)) { |