1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2020 Intel Corporation
4 */
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(address: 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 round
52 * down and up as needed. Start=0 and length=2G effectively iterates over
53 * 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, or
55 * 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#endif
78