1 /*
2  * Copyright (c) 2012-2015 Etnaviv Project
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, sub license,
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
12  * next paragraph) shall be included in all copies or substantial portions
13  * of the 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 NON-INFRINGEMENT. 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  * Authors:
24  *    Wladimir J. van der Laan <laanwj@gmail.com>
25  */
26 
27 #ifndef H_ETNAVIV_COMPILER
28 #define H_ETNAVIV_COMPILER
29 
30 #include "etnaviv_context.h"
31 #include "etnaviv_internal.h"
32 #include "pipe/p_compiler.h"
33 #include "pipe/p_shader_tokens.h"
34 
35 /* XXX some of these are pretty arbitrary limits, may be better to switch
36  * to dynamic allocation at some point.
37  */
38 #define ETNA_MAX_TEMPS (64) /* max temp register count of all Vivante hw */
39 #define ETNA_MAX_TOKENS (2048)
40 #define ETNA_MAX_IMM (1024) /* max const+imm in 32-bit words */
41 #define ETNA_MAX_DECL (2048) /* max declarations */
42 #define ETNA_MAX_DEPTH (32)
43 #define ETNA_MAX_INSTRUCTIONS (2048)
44 
45 /* compiler output per input/output */
46 struct etna_shader_inout {
47    int reg; /* native register */
48    struct tgsi_declaration_semantic semantic; /* tgsi semantic name and index */
49    int num_components;
50 };
51 
52 struct etna_shader_io_file {
53    size_t num_reg;
54    struct etna_shader_inout reg[ETNA_NUM_INPUTS];
55 };
56 
57 /* shader object, for linking */
58 struct etna_shader {
59    uint processor; /* TGSI_PROCESSOR_... */
60    uint32_t code_size; /* code size in uint32 words */
61    uint32_t *code;
62    unsigned num_temps;
63 
64    struct etna_shader_uniform_info uniforms;
65 
66    /* ETNA_DIRTY_* flags that, when set in context dirty, mean that the
67     * uniforms have to get (partial) reloaded. */
68    uint32_t uniforms_dirty_bits;
69 
70    /* inputs (for linking) for fs, the inputs must be in register 1..N */
71    struct etna_shader_io_file infile;
72 
73    /* outputs (for linking) */
74    struct etna_shader_io_file outfile;
75 
76    /* index into outputs (for linking) */
77    int output_count_per_semantic[TGSI_SEMANTIC_COUNT];
78    struct etna_shader_inout * *output_per_semantic_list; /* list of pointers to outputs */
79    struct etna_shader_inout **output_per_semantic[TGSI_SEMANTIC_COUNT];
80 
81    /* special outputs (vs only) */
82    int vs_pos_out_reg; /* VS position output */
83    int vs_pointsize_out_reg; /* VS point size output */
84    uint32_t vs_load_balancing;
85 
86    /* special outputs (ps only) */
87    int ps_color_out_reg; /* color output register */
88    int ps_depth_out_reg; /* depth output register */
89 
90    /* unknown input property (XX_INPUT_COUNT, field UNK8) */
91    uint32_t input_count_unk8;
92 };
93 
94 struct etna_varying {
95    uint32_t pa_attributes;
96    uint8_t num_components;
97    uint8_t use[4];
98    uint8_t reg;
99 };
100 
101 struct etna_shader_link_info {
102    /* each PS input is annotated with the VS output reg */
103    unsigned num_varyings;
104    struct etna_varying varyings[ETNA_NUM_INPUTS];
105 };
106 
107 struct etna_shader *
108 etna_compile_shader(const struct etna_specs *specs, const struct tgsi_token *tokens);
109 
110 void
111 etna_dump_shader(const struct etna_shader *shader);
112 
113 bool
114 etna_link_shader(struct etna_shader_link_info *info,
115                  const struct etna_shader *vs, const struct etna_shader *fs);
116 
117 void
118 etna_destroy_shader(struct etna_shader *shader);
119 
120 #endif
121