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51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2020 Intel Corporation
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*/
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#ifndef __I915_GEM_WW_H__
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#define __I915_GEM_WW_H__
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#include <drm/drm_drv.h>
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struct i915_gem_ww_ctx {
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struct ww_acquire_ctx ctx;
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struct list_head obj_list;
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struct drm_i915_gem_object *contended;
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unsigned short intr;
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unsigned short loop;
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};
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void i915_gem_ww_ctx_init(struct i915_gem_ww_ctx *ctx, bool intr);
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void i915_gem_ww_ctx_fini(struct i915_gem_ww_ctx *ctx);
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int __must_check i915_gem_ww_ctx_backoff(struct i915_gem_ww_ctx *ctx);
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void i915_gem_ww_unlock_single(struct drm_i915_gem_object *obj);
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/* Internal functions used by the inlines! Don't use. */
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static inline int __i915_gem_ww_fini(struct i915_gem_ww_ctx *ww, int err)
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{
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ww->loop = 0;
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if (err == -EDEADLK) {
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err = i915_gem_ww_ctx_backoff(ww);
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if (!err)
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ww->loop = 1;
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}
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if (!ww->loop)
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i915_gem_ww_ctx_fini(ww);
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return err;
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}
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static inline void
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__i915_gem_ww_init(struct i915_gem_ww_ctx *ww, bool intr)
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{
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i915_gem_ww_ctx_init(ww, intr);
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ww->loop = 1;
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}
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#define for_i915_gem_ww(_ww, _err, _intr) \
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for (__i915_gem_ww_init(_ww, _intr); (_ww)->loop; \
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_err = __i915_gem_ww_fini(_ww, _err))
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#endif
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