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8b1f7f92e5
There is an interesting refcounting loop: struct intel_memory_region has a struct ttm_resource_manager, ttm_resource_manager->move may hold a reference to i915_request, i915_request may hold a reference to intel_context, intel_context may hold a reference to drm_i915_gem_object, drm_i915_gem_object may hold a reference to intel_memory_region. Break this loop by dropping region reference counting. In addition, Have regions with a manager moving fence make sure that all region objects are released before freeing the region. v6: - Fix a code comment. Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211122214554.371864-4-thomas.hellstrom@linux.intel.com
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2021 Intel Corporation
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*/
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#ifndef _INTEL_REGION_TTM_H_
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#define _INTEL_REGION_TTM_H_
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#include <linux/types.h>
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#include "i915_selftest.h"
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struct drm_i915_private;
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struct intel_memory_region;
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struct ttm_resource;
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struct ttm_device_funcs;
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int intel_region_ttm_device_init(struct drm_i915_private *dev_priv);
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void intel_region_ttm_device_fini(struct drm_i915_private *dev_priv);
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int intel_region_ttm_init(struct intel_memory_region *mem);
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int intel_region_ttm_fini(struct intel_memory_region *mem);
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struct i915_refct_sgt *
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intel_region_ttm_resource_to_rsgt(struct intel_memory_region *mem,
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struct ttm_resource *res);
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void intel_region_ttm_resource_free(struct intel_memory_region *mem,
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struct ttm_resource *res);
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int intel_region_to_ttm_type(const struct intel_memory_region *mem);
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struct ttm_device_funcs *i915_ttm_driver(void);
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#ifdef CONFIG_DRM_I915_SELFTEST
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struct ttm_resource *
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intel_region_ttm_resource_alloc(struct intel_memory_region *mem,
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resource_size_t size,
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unsigned int flags);
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#endif
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#endif /* _INTEL_REGION_TTM_H_ */
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