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1/* SPDX-License-Identifier: MIT */2/*3 * Copyright © 2020 Intel Corporation4 */5 6#ifndef __GEN6_PPGTT_H__7#define __GEN6_PPGTT_H__8 9#include "intel_gtt.h"10 11struct i915_gem_ww_ctx;12 13struct gen6_ppgtt {14 struct i915_ppgtt base;15 16 struct mutex flush;17 struct i915_vma *vma;18 gen6_pte_t __iomem *pd_addr;19 u32 pp_dir;20 21 atomic_t pin_count;22 23 bool scan_for_unused_pt;24};25 26static inline u32 gen6_pte_index(u32 addr)27{28 return i915_pte_index(addr, GEN6_PDE_SHIFT);29}30 31static inline u32 gen6_pte_count(u32 addr, u32 length)32{33 return i915_pte_count(addr, length, GEN6_PDE_SHIFT);34}35 36static inline u32 gen6_pde_index(u32 addr)37{38 return i915_pde_index(addr, GEN6_PDE_SHIFT);39}40 41#define __to_gen6_ppgtt(base) container_of(base, struct gen6_ppgtt, base)42 43static inline struct gen6_ppgtt *to_gen6_ppgtt(struct i915_ppgtt *base)44{45 BUILD_BUG_ON(offsetof(struct gen6_ppgtt, base));46 return __to_gen6_ppgtt(base);47}48 49/*50 * gen6_for_each_pde() iterates over every pde from start until start+length.51 * If start and start+length are not perfectly divisible, the macro will round52 * down and up as needed. Start=0 and length=2G effectively iterates over53 * every PDE in the system. The macro modifies ALL its parameters except 'pd',54 * so each of the other parameters should preferably be a simple variable, or55 * at most an lvalue with no side-effects!56 */57#define gen6_for_each_pde(pt, pd, start, length, iter) \58 for (iter = gen6_pde_index(start); \59 length > 0 && iter < I915_PDES && \60 (pt = i915_pt_entry(pd, iter), true); \61 ({ u32 temp = ALIGN(start + 1, 1 << GEN6_PDE_SHIFT); \62 temp = min(temp - start, length); \63 start += temp; length -= temp; }), ++iter)64 65#define gen6_for_all_pdes(pt, pd, iter) \66 for (iter = 0; \67 iter < I915_PDES && \68 (pt = i915_pt_entry(pd, iter), true); \69 ++iter)70 71int gen6_ppgtt_pin(struct i915_ppgtt *base, struct i915_gem_ww_ctx *ww);72void gen6_ppgtt_unpin(struct i915_ppgtt *base);73void gen6_ppgtt_enable(struct intel_gt *gt);74void gen7_ppgtt_enable(struct intel_gt *gt);75struct i915_ppgtt *gen6_ppgtt_create(struct intel_gt *gt);76 77#endif78