1 /*
2 * Copyright (C) 2018 Alyssa Rosenzweig
3 * Copyright (C) 2019-2021 Collabora, Ltd.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 #ifndef __PAN_BLEND_H__
26 #define __PAN_BLEND_H__
27
28 #include "genxml/gen_macros.h"
29
30 #include "compiler/nir/nir.h"
31 #include "util/blend.h"
32 #include "util/format/u_format.h"
33 #include "util/u_dynarray.h"
34
35 #include "panfrost/util/pan_ir.h"
36
37 struct MALI_BLEND_EQUATION;
38
39 struct pan_blend_shader_cache {
40 unsigned gpu_id;
41 struct hash_table *shaders;
42 pthread_mutex_t lock;
43 };
44
45 struct pan_blend_equation {
46 unsigned blend_enable : 1;
47 enum pipe_blend_func rgb_func : 3;
48 enum pipe_blendfactor rgb_src_factor : 5;
49 enum pipe_blendfactor rgb_dst_factor : 5;
50 enum pipe_blend_func alpha_func : 3;
51 enum pipe_blendfactor alpha_src_factor : 5;
52 enum pipe_blendfactor alpha_dst_factor : 5;
53 unsigned color_mask : 4;
54 unsigned padding : 1;
55 };
56
57 struct pan_blend_rt_state {
58 /* RT format */
59 enum pipe_format format;
60
61 /* Number of samples */
62 unsigned nr_samples;
63
64 struct pan_blend_equation equation;
65 };
66
67 struct pan_blend_state {
68 bool alpha_to_one;
69 bool logicop_enable;
70 enum pipe_logicop logicop_func;
71 float constants[4];
72 unsigned rt_count;
73 struct pan_blend_rt_state rts[8];
74 };
75
76 struct pan_blend_shader_key {
77 enum pipe_format format;
78 nir_alu_type src0_type, src1_type;
79 uint32_t rt : 3;
80 uint32_t has_constants : 1;
81 uint32_t logicop_enable : 1;
82 uint32_t logicop_func : 4;
83 uint32_t nr_samples : 5;
84 uint32_t alpha_to_one : 1;
85 uint32_t padding : 17;
86 struct pan_blend_equation equation;
87 };
88
89 struct pan_blend_shader_variant {
90 struct list_head node;
91 float constants[4];
92 struct util_dynarray binary;
93 unsigned first_tag;
94 unsigned work_reg_count;
95 };
96
97 #define PAN_BLEND_SHADER_MAX_VARIANTS 32
98
99 struct pan_blend_shader {
100 struct pan_blend_shader_key key;
101 unsigned nvariants;
102 struct list_head variants;
103 };
104
105 bool pan_blend_reads_dest(const struct pan_blend_equation eq);
106
107 bool pan_blend_can_fixed_function(const struct pan_blend_equation equation,
108 bool supports_2src);
109
110 bool pan_blend_is_opaque(const struct pan_blend_equation eq);
111
112 bool pan_blend_alpha_zero_nop(const struct pan_blend_equation eq);
113
114 bool pan_blend_alpha_one_store(const struct pan_blend_equation eq);
115
116 unsigned pan_blend_constant_mask(const struct pan_blend_equation eq);
117
118 /* Fixed-function blending only supports a single constant, so if multiple bits
119 * are set in constant_mask, the constants must match. Therefore we may pick
120 * just the first constant. */
121
122 static inline float
pan_blend_get_constant(unsigned mask,const float * constants)123 pan_blend_get_constant(unsigned mask, const float *constants)
124 {
125 return mask ? constants[ffs(mask) - 1] : 0.0;
126 }
127
128 /* v6 doesn't support blend constants in FF blend equations whatsoever, and v7
129 * only uses the constant from RT 0 (TODO: what if it's the same constant? or a
130 * constant is shared?) */
131
132 static inline bool
pan_blend_supports_constant(unsigned arch,unsigned rt)133 pan_blend_supports_constant(unsigned arch, unsigned rt)
134 {
135 return !((arch == 6) || (arch == 7 && rt > 0));
136 }
137
138 /* The SOURCE_2 value is new in Bifrost */
139
140 static inline bool
pan_blend_supports_2src(unsigned arch)141 pan_blend_supports_2src(unsigned arch)
142 {
143 return (arch >= 6);
144 }
145
146 bool pan_blend_is_homogenous_constant(unsigned mask, const float *constants);
147
148 void pan_blend_to_fixed_function_equation(const struct pan_blend_equation eq,
149 struct MALI_BLEND_EQUATION *equation);
150
151 uint32_t pan_pack_blend(const struct pan_blend_equation equation);
152
153 void pan_blend_shader_cache_init(struct pan_blend_shader_cache *cache,
154 unsigned gpu_id);
155
156 void pan_blend_shader_cache_cleanup(struct pan_blend_shader_cache *cache);
157
158 #ifdef PAN_ARCH
159
160 nir_shader *GENX(pan_blend_create_shader)(const struct pan_blend_state *state,
161 nir_alu_type src0_type,
162 nir_alu_type src1_type, unsigned rt);
163
164 #if PAN_ARCH >= 6
165 uint64_t GENX(pan_blend_get_internal_desc)(enum pipe_format fmt, unsigned rt,
166 unsigned force_size, bool dithered);
167
168 bool GENX(pan_inline_rt_conversion)(nir_shader *s, enum pipe_format *formats);
169 #endif
170
171 /* Take blend_shaders.lock before calling this function and release it when
172 * you're done with the shader variant object.
173 */
174 struct pan_blend_shader_variant *GENX(pan_blend_get_shader_locked)(
175 struct pan_blend_shader_cache *cache, const struct pan_blend_state *state,
176 nir_alu_type src0_type, nir_alu_type src1_type, unsigned rt);
177 #endif
178
179 #endif
180