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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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eb8d0f5af4
Now that the submission backends are controlled via their own spinlocks, with a wave of a magic wand we can lift the struct_mutex requirement around GPU reset. That is we allow the submission frontend (userspace) to keep on submitting while we process the GPU reset as we can suspend the backend independently. The major change is around the backoff/handoff strategy for performing the reset. With no mutex deadlock, we no longer have to coordinate with any waiter, and just perform the reset immediately. Testcase: igt/gem_mmap_gtt/hang # regresses Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190125132230.22221-3-chris@chris-wilson.co.uk
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
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* SPDX-License-Identifier: MIT
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*
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* Copyright © 2008-2018 Intel Corporation
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*/
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#ifndef I915_RESET_H
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#define I915_RESET_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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struct drm_i915_private;
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struct intel_engine_cs;
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struct intel_guc;
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__printf(4, 5)
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void i915_handle_error(struct drm_i915_private *i915,
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u32 engine_mask,
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unsigned long flags,
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const char *fmt, ...);
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#define I915_ERROR_CAPTURE BIT(0)
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void i915_clear_error_registers(struct drm_i915_private *i915);
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void i915_reset(struct drm_i915_private *i915,
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unsigned int stalled_mask,
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const char *reason);
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int i915_reset_engine(struct intel_engine_cs *engine,
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const char *reason);
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void i915_reset_request(struct i915_request *rq, bool guilty);
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bool i915_reset_flush(struct drm_i915_private *i915);
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bool intel_has_gpu_reset(struct drm_i915_private *i915);
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bool intel_has_reset_engine(struct drm_i915_private *i915);
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int intel_gpu_reset(struct drm_i915_private *i915, u32 engine_mask);
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int intel_reset_guc(struct drm_i915_private *i915);
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struct i915_wedge_me {
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struct delayed_work work;
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struct drm_i915_private *i915;
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const char *name;
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};
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void __i915_init_wedge(struct i915_wedge_me *w,
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struct drm_i915_private *i915,
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long timeout,
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const char *name);
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void __i915_fini_wedge(struct i915_wedge_me *w);
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#define i915_wedge_on_timeout(W, DEV, TIMEOUT) \
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for (__i915_init_wedge((W), (DEV), (TIMEOUT), __func__); \
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(W)->i915; \
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__i915_fini_wedge((W)))
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#endif /* I915_RESET_H */
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