These patches are to add engine reset feature from Gen8. This is also referred to as Timeout detection and recovery (TDR). This complements to the full gpu reset feature available in i915 but it only allows to reset a particular engine instead of all engines thus providing a light weight engine reset and recovery mechanism. This implementation is for execlist based submission only hence limited from Gen8 onwards. For GuC based submission, additional changes can be added later on. Timeout detection relies on the existing hangcheck which remains the same, main changes are to the recovery mechanism. Once we detect a hang on a particular engine we identify the request that caused the hang, skip the request and adjust head pointers to allow the execution to proceed normally. After some cleanup, submissions are restarted to process remaining work queued to that engine. If engine reset fails to recover engine correctly then we fallback to full gpu reset. v2: ELSP queue request tracking and reset path changes to handle incomplete requests during reset. Thanks to Chris Wilson for providing these patches. v3: Let the waiter keep handling the full gpu reset if it already has the lock; point out that GuC submission needs a different method to restart workloads after the engine reset completes. v4: Handle reset as 2 level resets, by first going to engine only and fall backing to full/chip reset as needed, i.e. reset_engine will need the struct_mutex. Arun Siluvery (6): drm/i915: Update i915.reset to handle engine resets drm/i915/tdr: Modify error handler for per engine hang recovery drm/i915/tdr: Add support for per engine reset recovery drm/i915/tdr: Add engine reset count to error state drm/i915/tdr: Export per-engine reset count info to debugfs drm/i915/tdr: Enable Engine reset and recovery support Michel Thierry (3): drm/i915: Keep i915_handle_error kerneldoc parameters together drm/i915: Update i915_reset parameter for kerneldoc drm/i915: Add engine reset count in get-reset-stats ioctl Mika Kuoppala (1): drm/i915: Skip reset request if there is one already drivers/gpu/drm/i915/i915_debugfs.c | 21 ++++++ drivers/gpu/drm/i915/i915_drv.c | 118 +++++++++++++++++++++++++++++++- drivers/gpu/drm/i915/i915_drv.h | 16 +++++ drivers/gpu/drm/i915/i915_gem.c | 2 +- drivers/gpu/drm/i915/i915_gem_context.c | 14 +++- drivers/gpu/drm/i915/i915_gpu_error.c | 3 + drivers/gpu/drm/i915/i915_irq.c | 34 ++++++--- drivers/gpu/drm/i915/i915_params.c | 6 +- drivers/gpu/drm/i915/i915_params.h | 2 +- drivers/gpu/drm/i915/i915_pci.c | 5 +- drivers/gpu/drm/i915/intel_uncore.c | 61 +++++++++++++++-- include/uapi/drm/i915_drm.h | 3 +- 12 files changed, 258 insertions(+), 27 deletions(-) -- 2.11.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
