1 /*
2 * Copyright (C) 2018-2021 Alyssa Rosenzweig <alyssa@rosenzweig.io>
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 #ifndef __AGX_PUBLIC_H_
25 #define __AGX_PUBLIC_H_
26
27 #include "compiler/nir/nir.h"
28 #include "util/u_dynarray.h"
29 #include "asahi/lib/agx_pack.h"
30
31 enum agx_push_type {
32 /* Array of 64-bit pointers to the base addresses (BASES) and array of
33 * 16-bit sizes for optional bounds checking (SIZES) */
34 AGX_PUSH_UBO_BASES = 0,
35 AGX_PUSH_UBO_SIZES = 1,
36 AGX_PUSH_VBO_BASES = 2,
37 AGX_PUSH_VBO_SIZES = 3,
38 AGX_PUSH_SSBO_BASES = 4,
39 AGX_PUSH_SSBO_SIZES = 5,
40
41 /* Push the attached constant memory */
42 AGX_PUSH_CONSTANTS = 6,
43
44 /* Push the content of a UBO */
45 AGX_PUSH_UBO_DATA = 7,
46
47 /* RGBA blend constant (FP32) */
48 AGX_PUSH_BLEND_CONST = 8,
49
50 /* Keep last */
51 AGX_PUSH_NUM_TYPES
52 };
53
54 struct agx_push {
55 /* Contents to push */
56 enum agx_push_type type : 8;
57
58 /* Base of where to push, indexed in 16-bit units. The uniform file contains
59 * 512 = 2^9 such units. */
60 unsigned base : 9;
61
62 /* Number of 16-bit units to push */
63 unsigned length : 9;
64
65 /* If set, rather than pushing the specified data, push a pointer to the
66 * specified data. This is slower to access but enables indirect access, as
67 * the uniform file does not support indirection. */
68 bool indirect : 1;
69
70 union {
71 struct {
72 uint16_t ubo;
73 uint16_t offset;
74 } ubo_data;
75 };
76 };
77
78 /* Arbitrary */
79 #define AGX_MAX_PUSH_RANGES (16)
80 #define AGX_MAX_VARYINGS (32)
81
82 struct agx_varyings {
83 unsigned nr_descs, nr_slots;
84 struct agx_varying_packed packed[AGX_MAX_VARYINGS];
85 };
86
87 struct agx_shader_info {
88 unsigned push_ranges;
89 struct agx_push push[AGX_MAX_PUSH_RANGES];
90 struct agx_varyings varyings;
91
92 /* Does the shader read the tilebuffer? */
93 bool reads_tib;
94
95 /* Does the shader write point size? */
96 bool writes_psiz;
97 };
98
99 #define AGX_MAX_RTS (8)
100 #define AGX_MAX_ATTRIBS (16)
101 #define AGX_MAX_VBUFS (16)
102
103 enum agx_format {
104 AGX_FORMAT_I8 = 0,
105 AGX_FORMAT_I16 = 1,
106 AGX_FORMAT_I32 = 2,
107 AGX_FORMAT_F16 = 3,
108 AGX_FORMAT_U8NORM = 4,
109 AGX_FORMAT_S8NORM = 5,
110 AGX_FORMAT_U16NORM = 6,
111 AGX_FORMAT_S16NORM = 7,
112 AGX_FORMAT_RGB10A2 = 8,
113 AGX_FORMAT_SRGBA8 = 10,
114 AGX_FORMAT_RG11B10F = 12,
115 AGX_FORMAT_RGB9E5 = 13,
116
117 /* Keep last */
118 AGX_NUM_FORMATS,
119 };
120
121 /* Returns the number of bits at the bottom of the address required to be zero.
122 * That is, returns the base-2 logarithm of the minimum alignment for an
123 * agx_format, where the minimum alignment is 2^n where n is the result of this
124 * function. The offset argument to device_load is left-shifted by this amount
125 * in the hardware */
126
127 static inline unsigned
agx_format_shift(enum agx_format format)128 agx_format_shift(enum agx_format format)
129 {
130 switch (format) {
131 case AGX_FORMAT_I8:
132 case AGX_FORMAT_U8NORM:
133 case AGX_FORMAT_S8NORM:
134 case AGX_FORMAT_SRGBA8:
135 return 0;
136
137 case AGX_FORMAT_I16:
138 case AGX_FORMAT_F16:
139 case AGX_FORMAT_U16NORM:
140 case AGX_FORMAT_S16NORM:
141 return 1;
142
143 case AGX_FORMAT_I32:
144 case AGX_FORMAT_RGB10A2:
145 case AGX_FORMAT_RG11B10F:
146 case AGX_FORMAT_RGB9E5:
147 return 2;
148
149 default:
150 unreachable("invalid format");
151 }
152 }
153
154 struct agx_attribute {
155 uint32_t divisor;
156
157 unsigned buf : 5;
158 unsigned src_offset : 16;
159 unsigned nr_comps_minus_1 : 2;
160 enum agx_format format : 4;
161 unsigned padding : 5;
162 };
163
164 struct agx_vs_shader_key {
165 unsigned num_vbufs;
166 unsigned vbuf_strides[AGX_MAX_VBUFS];
167
168 struct agx_attribute attributes[AGX_MAX_ATTRIBS];
169
170 /* Set to true for clip coordinates to range [0, 1] instead of [-1, 1] */
171 bool clip_halfz : 1;
172 };
173
174 struct agx_fs_shader_key {
175 enum agx_format tib_formats[AGX_MAX_RTS];
176 };
177
178 struct agx_shader_key {
179 union {
180 struct agx_vs_shader_key vs;
181 struct agx_fs_shader_key fs;
182 };
183 };
184
185 void
186 agx_compile_shader_nir(nir_shader *nir,
187 struct agx_shader_key *key,
188 struct util_dynarray *binary,
189 struct agx_shader_info *out);
190
191 static const nir_shader_compiler_options agx_nir_options = {
192 .lower_scmp = true,
193 .lower_flrp16 = true,
194 .lower_flrp32 = true,
195 .lower_ffract = true,
196 .lower_fmod = true,
197 .lower_fdiv = true,
198 .lower_isign = true,
199 .lower_iabs = true,
200 .lower_fpow = true,
201 .lower_find_lsb = true,
202 .lower_ifind_msb = true,
203 .lower_fdph = true,
204 .lower_wpos_pntc = true,
205 .lower_fsign = true,
206 .lower_rotate = true,
207 .lower_pack_split = true,
208 .lower_insert_byte = true,
209 .lower_insert_word = true,
210 .lower_uniforms_to_ubo = true,
211 .lower_cs_local_index_from_id = true,
212
213 .lower_doubles_options = nir_lower_dmod,
214 .lower_int64_options = ~(nir_lower_iadd64 | nir_lower_imul_2x32_64),
215
216 .force_indirect_unrolling = (nir_var_shader_in | nir_var_shader_out | nir_var_function_temp),
217
218 .has_fsub = true,
219 .has_isub = true,
220 .has_cs_global_id = true,
221
222 .vectorize_io = true,
223 .fuse_ffma16 = true,
224 .fuse_ffma32 = true,
225 .use_interpolated_input_intrinsics = true,
226 };
227
228 #endif
229