1 /* $NetBSD: intel_sseu.h,v 1.2 2021/12/18 23:45:30 riastradh Exp $ */
2
3 /*
4 * SPDX-License-Identifier: MIT
5 *
6 * Copyright © 2019 Intel Corporation
7 */
8
9 #ifndef __INTEL_SSEU_H__
10 #define __INTEL_SSEU_H__
11
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14
15 #include "i915_gem.h"
16
17 struct drm_i915_private;
18
19 #define GEN_MAX_SLICES (6) /* CNL upper bound */
20 #define GEN_MAX_SUBSLICES (8) /* ICL upper bound */
21 #define GEN_SSEU_STRIDE(max_entries) DIV_ROUND_UP(max_entries, BITS_PER_BYTE)
22 #define GEN_MAX_SUBSLICE_STRIDE GEN_SSEU_STRIDE(GEN_MAX_SUBSLICES)
23 #define GEN_MAX_EUS (16) /* TGL upper bound */
24 #define GEN_MAX_EU_STRIDE GEN_SSEU_STRIDE(GEN_MAX_EUS)
25
26 struct sseu_dev_info {
27 u8 slice_mask;
28 u8 subslice_mask[GEN_MAX_SLICES * GEN_MAX_SUBSLICE_STRIDE];
29 u8 eu_mask[GEN_MAX_SLICES * GEN_MAX_SUBSLICES * GEN_MAX_EU_STRIDE];
30 u16 eu_total;
31 u8 eu_per_subslice;
32 u8 min_eu_in_pool;
33 /* For each slice, which subslice(s) has(have) 7 EUs (bitfield)? */
34 u8 subslice_7eu[3];
35 u8 has_slice_pg:1;
36 u8 has_subslice_pg:1;
37 u8 has_eu_pg:1;
38
39 /* Topology fields */
40 u8 max_slices;
41 u8 max_subslices;
42 u8 max_eus_per_subslice;
43
44 u8 ss_stride;
45 u8 eu_stride;
46 };
47
48 /*
49 * Powergating configuration for a particular (context,engine).
50 */
51 struct intel_sseu {
52 u8 slice_mask;
53 u8 subslice_mask;
54 u8 min_eus_per_subslice;
55 u8 max_eus_per_subslice;
56 };
57
58 static inline struct intel_sseu
intel_sseu_from_device_info(const struct sseu_dev_info * sseu)59 intel_sseu_from_device_info(const struct sseu_dev_info *sseu)
60 {
61 struct intel_sseu value = {
62 .slice_mask = sseu->slice_mask,
63 .subslice_mask = sseu->subslice_mask[0],
64 .min_eus_per_subslice = sseu->max_eus_per_subslice,
65 .max_eus_per_subslice = sseu->max_eus_per_subslice,
66 };
67
68 return value;
69 }
70
71 static inline bool
intel_sseu_has_subslice(const struct sseu_dev_info * sseu,int slice,int subslice)72 intel_sseu_has_subslice(const struct sseu_dev_info *sseu, int slice,
73 int subslice)
74 {
75 u8 mask;
76 int ss_idx = subslice / BITS_PER_BYTE;
77
78 GEM_BUG_ON(ss_idx >= sseu->ss_stride);
79
80 mask = sseu->subslice_mask[slice * sseu->ss_stride + ss_idx];
81
82 return mask & BIT(subslice % BITS_PER_BYTE);
83 }
84
85 void intel_sseu_set_info(struct sseu_dev_info *sseu, u8 max_slices,
86 u8 max_subslices, u8 max_eus_per_subslice);
87
88 unsigned int
89 intel_sseu_subslice_total(const struct sseu_dev_info *sseu);
90
91 unsigned int
92 intel_sseu_subslices_per_slice(const struct sseu_dev_info *sseu, u8 slice);
93
94 u32 intel_sseu_get_subslices(const struct sseu_dev_info *sseu, u8 slice);
95
96 void intel_sseu_set_subslices(struct sseu_dev_info *sseu, int slice,
97 u32 ss_mask);
98
99 u32 intel_sseu_make_rpcs(struct drm_i915_private *i915,
100 const struct intel_sseu *req_sseu);
101
102 #endif /* __INTEL_SSEU_H__ */
103