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9ce25e72cc
Introduce a new ABI method for detecting a wedged driver by reporting -EIO from DRM_IOCTL_I915_GEM_CONTEXT_CREATE. This came up in considering how to handle context recovery from userspace. There we wish to create a new context after the original is banned (the clients opts into the no recovery after reset strategy) in order to rebuild the mesa context from scratch. In doing so, if the device was wedged and not the context banned, we would fall into a loop of permanently trying to recreate the context and never making forward progress. This patch would inform the client that we are no longer able to create a context, and the client would have no choice but to abort (or at least inform its callers about the lost device for anv). References: https://lists.freedesktop.org/archives/mesa-dev/2019-February/215469.html Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190220225556.28715-1-chris@chris-wilson.co.uk |
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