78 lines
2.1 KiB
C
78 lines
2.1 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 __GEN6_PPGTT_H__
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#define __GEN6_PPGTT_H__
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#include "intel_gtt.h"
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struct i915_gem_ww_ctx;
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struct gen6_ppgtt {
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struct i915_ppgtt base;
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struct mutex flush;
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struct i915_vma *vma;
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gen6_pte_t __iomem *pd_addr;
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u32 pp_dir;
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atomic_t pin_count;
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bool scan_for_unused_pt;
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};
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static inline u32 gen6_pte_index(u32 addr)
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{
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return i915_pte_index(addr, GEN6_PDE_SHIFT);
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}
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static inline u32 gen6_pte_count(u32 addr, u32 length)
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{
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return i915_pte_count(addr, length, GEN6_PDE_SHIFT);
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}
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static inline u32 gen6_pde_index(u32 addr)
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{
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return i915_pde_index(addr, GEN6_PDE_SHIFT);
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}
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#define __to_gen6_ppgtt(base) container_of(base, struct gen6_ppgtt, base)
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static inline struct gen6_ppgtt *to_gen6_ppgtt(struct i915_ppgtt *base)
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{
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BUILD_BUG_ON(offsetof(struct gen6_ppgtt, base));
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return __to_gen6_ppgtt(base);
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}
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/*
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* gen6_for_each_pde() iterates over every pde from start until start+length.
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* If start and start+length are not perfectly divisible, the macro will round
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* down and up as needed. Start=0 and length=2G effectively iterates over
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* every PDE in the system. The macro modifies ALL its parameters except 'pd',
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* so each of the other parameters should preferably be a simple variable, or
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* at most an lvalue with no side-effects!
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*/
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#define gen6_for_each_pde(pt, pd, start, length, iter) \
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for (iter = gen6_pde_index(start); \
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length > 0 && iter < I915_PDES && \
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(pt = i915_pt_entry(pd, iter), true); \
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({ u32 temp = ALIGN(start + 1, 1 << GEN6_PDE_SHIFT); \
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temp = min(temp - start, length); \
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start += temp; length -= temp; }), ++iter)
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#define gen6_for_all_pdes(pt, pd, iter) \
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for (iter = 0; \
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iter < I915_PDES && \
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(pt = i915_pt_entry(pd, iter), true); \
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++iter)
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int gen6_ppgtt_pin(struct i915_ppgtt *base, struct i915_gem_ww_ctx *ww);
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void gen6_ppgtt_unpin(struct i915_ppgtt *base);
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void gen6_ppgtt_enable(struct intel_gt *gt);
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void gen7_ppgtt_enable(struct intel_gt *gt);
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struct i915_ppgtt *gen6_ppgtt_create(struct intel_gt *gt);
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#endif
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