1 /*
2 * Copyright (C) 2021 Collabora Ltd.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24 #ifndef PANVK_VARYINGS_H
25 #define PANVK_VARYINGS_H
26
27 #include "util/bitset.h"
28 #include "util/format/u_format.h"
29
30 #include "compiler/shader_enums.h"
31 #include "panfrost-job.h"
32
33 #include "pan_pool.h"
34
35 struct pan_pool;
36 struct panvk_device;
37
38 enum panvk_varying_buf_id {
39 PANVK_VARY_BUF_GENERAL,
40 PANVK_VARY_BUF_POSITION,
41 PANVK_VARY_BUF_PSIZ,
42 PANVK_VARY_BUF_PNTCOORD,
43 PANVK_VARY_BUF_FRAGCOORD,
44
45 /* Keep last */
46 PANVK_VARY_BUF_MAX,
47 };
48
49 struct panvk_varying {
50 unsigned buf;
51 unsigned offset;
52 enum pipe_format format;
53 };
54
55 struct panvk_varying_buf {
56 mali_ptr address;
57 void *cpu;
58 unsigned stride;
59 unsigned size;
60 };
61
62 struct panvk_varyings_info {
63 struct panvk_varying varying[VARYING_SLOT_MAX];
64 BITSET_DECLARE(active, VARYING_SLOT_MAX);
65 struct panvk_varying_buf buf[VARYING_SLOT_MAX];
66 struct {
67 unsigned count;
68 gl_varying_slot loc[VARYING_SLOT_MAX];
69 } stage[MESA_SHADER_STAGES];
70 unsigned buf_mask;
71 };
72
73 static inline unsigned
panvk_varying_buf_index(const struct panvk_varyings_info * varyings,enum panvk_varying_buf_id b)74 panvk_varying_buf_index(const struct panvk_varyings_info *varyings,
75 enum panvk_varying_buf_id b)
76 {
77 return util_bitcount(varyings->buf_mask & BITFIELD_MASK(b));
78 }
79
80 static inline enum panvk_varying_buf_id
panvk_varying_buf_id(bool fs,gl_varying_slot loc)81 panvk_varying_buf_id(bool fs, gl_varying_slot loc)
82 {
83 switch (loc) {
84 case VARYING_SLOT_POS:
85 return fs ? PANVK_VARY_BUF_FRAGCOORD : PANVK_VARY_BUF_POSITION;
86 case VARYING_SLOT_PSIZ:
87 return PANVK_VARY_BUF_PSIZ;
88 case VARYING_SLOT_PNTC:
89 return PANVK_VARY_BUF_PNTCOORD;
90 default:
91 return PANVK_VARY_BUF_GENERAL;
92 }
93 }
94
95 static inline bool
panvk_varying_is_builtin(gl_shader_stage stage,gl_varying_slot loc)96 panvk_varying_is_builtin(gl_shader_stage stage, gl_varying_slot loc)
97 {
98 bool fs = stage == MESA_SHADER_FRAGMENT;
99
100 switch (loc) {
101 case VARYING_SLOT_POS:
102 case VARYING_SLOT_PNTC:
103 return fs;
104 default:
105 return false;
106 }
107 }
108
109 #if defined(PAN_ARCH) && PAN_ARCH <= 5
110 static inline enum mali_attribute_special
panvk_varying_special_buf_id(enum panvk_varying_buf_id buf_id)111 panvk_varying_special_buf_id(enum panvk_varying_buf_id buf_id)
112 {
113 switch (buf_id) {
114 case PANVK_VARY_BUF_PNTCOORD:
115 return MALI_ATTRIBUTE_SPECIAL_POINT_COORD;
116 case PANVK_VARY_BUF_FRAGCOORD:
117 return MALI_ATTRIBUTE_SPECIAL_FRAG_COORD;
118 default:
119 return 0;
120 }
121 }
122 #endif
123
124 static inline unsigned
panvk_varying_size(const struct panvk_varyings_info * varyings,gl_varying_slot loc)125 panvk_varying_size(const struct panvk_varyings_info *varyings,
126 gl_varying_slot loc)
127 {
128 switch (loc) {
129 case VARYING_SLOT_POS:
130 return sizeof(float) * 4;
131 case VARYING_SLOT_PSIZ:
132 return sizeof(uint16_t);
133 default:
134 return util_format_get_blocksize(varyings->varying[loc].format);
135 }
136 }
137
138 #ifdef PAN_ARCH
139 static inline unsigned
panvk_varyings_buf_count(struct panvk_varyings_info * varyings)140 panvk_varyings_buf_count(struct panvk_varyings_info *varyings)
141 {
142 return util_bitcount(varyings->buf_mask) + (PAN_ARCH >= 6 ? 1 : 0);
143 }
144 #endif
145
146 static inline void
panvk_varyings_alloc(struct panvk_varyings_info * varyings,struct pan_pool * varying_mem_pool,unsigned vertex_count)147 panvk_varyings_alloc(struct panvk_varyings_info *varyings,
148 struct pan_pool *varying_mem_pool,
149 unsigned vertex_count)
150 {
151 for (unsigned i = 0; i < PANVK_VARY_BUF_MAX; i++) {
152 if (!(varyings->buf_mask & (1 << i))) continue;
153
154 unsigned buf_idx = panvk_varying_buf_index(varyings, i);
155 unsigned size = varyings->buf[buf_idx].stride * vertex_count;
156 if (!size)
157 continue;
158
159 struct panfrost_ptr ptr =
160 pan_pool_alloc_aligned(varying_mem_pool, size, 64);
161
162 varyings->buf[buf_idx].size = size;
163 varyings->buf[buf_idx].address = ptr.gpu;
164 varyings->buf[buf_idx].cpu = ptr.cpu;
165 }
166 }
167
168 #endif
169