1/*
2 * Copyright 2019 Valve Corporation
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 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24#ifndef AC_SHADER_ARGS_H
25#define AC_SHADER_ARGS_H
26
27#include <stdbool.h>
28#include <stdint.h>
29
30#define AC_MAX_INLINE_PUSH_CONSTS 8
31
32enum ac_arg_regfile
33{
34   AC_ARG_SGPR,
35   AC_ARG_VGPR,
36};
37
38enum ac_arg_type
39{
40   AC_ARG_FLOAT,
41   AC_ARG_INT,
42   AC_ARG_CONST_PTR,       /* Pointer to i8 array */
43   AC_ARG_CONST_FLOAT_PTR, /* Pointer to f32 array */
44   AC_ARG_CONST_PTR_PTR,   /* Pointer to pointer to i8 array */
45   AC_ARG_CONST_DESC_PTR,  /* Pointer to v4i32 array */
46   AC_ARG_CONST_IMAGE_PTR, /* Pointer to v8i32 array */
47};
48
49struct ac_arg {
50   uint16_t arg_index;
51   bool used;
52};
53
54#define AC_MAX_ARGS 384 /* including all VS->TCS IO */
55
56struct ac_shader_args {
57   /* Info on how to declare arguments */
58   struct {
59      enum ac_arg_type type;
60      enum ac_arg_regfile file;
61      uint8_t offset;
62      uint8_t size;
63      bool skip;
64   } args[AC_MAX_ARGS];
65
66   uint16_t arg_count;
67   uint16_t num_sgprs_used;
68   uint16_t num_vgprs_used;
69
70   uint16_t return_count;
71   uint16_t num_sgprs_returned;
72   uint16_t num_vgprs_returned;
73
74   /* VS */
75   struct ac_arg base_vertex;
76   struct ac_arg start_instance;
77   struct ac_arg draw_id;
78   struct ac_arg vertex_buffers;
79   struct ac_arg vertex_id;
80   struct ac_arg vs_rel_patch_id;
81   struct ac_arg vs_prim_id;
82   struct ac_arg instance_id;
83
84   /* Merged shaders */
85   struct ac_arg tess_offchip_offset;
86   struct ac_arg merged_wave_info;
87   /* On gfx10:
88    *  - bits 0..11: ordered_wave_id
89    *  - bits 12..20: number of vertices in group
90    *  - bits 22..30: number of primitives in group
91    */
92   struct ac_arg gs_tg_info;
93   struct ac_arg scratch_offset;
94
95   /* TCS */
96   struct ac_arg tcs_factor_offset;
97   struct ac_arg tcs_patch_id;
98   struct ac_arg tcs_rel_ids;
99
100   /* TES */
101   struct ac_arg tes_u;
102   struct ac_arg tes_v;
103   struct ac_arg tes_rel_patch_id;
104   struct ac_arg tes_patch_id;
105
106   /* GS */
107   struct ac_arg es2gs_offset;      /* separate legacy ES */
108   struct ac_arg gs2vs_offset;      /* legacy GS */
109   struct ac_arg gs_wave_id;        /* legacy GS */
110   struct ac_arg gs_vtx_offset[6];  /* GFX6-8: [0-5], GFX9+: [0-2] packed */
111   struct ac_arg gs_prim_id;
112   struct ac_arg gs_invocation_id;
113
114   /* Streamout */
115   struct ac_arg streamout_config;
116   struct ac_arg streamout_write_index;
117   struct ac_arg streamout_offset[4];
118
119   /* PS */
120   struct ac_arg frag_pos[4];
121   struct ac_arg front_face;
122   struct ac_arg ancillary;
123   struct ac_arg sample_coverage;
124   struct ac_arg prim_mask;
125   struct ac_arg persp_sample;
126   struct ac_arg persp_center;
127   struct ac_arg persp_centroid;
128   struct ac_arg pull_model;
129   struct ac_arg linear_sample;
130   struct ac_arg linear_center;
131   struct ac_arg linear_centroid;
132
133   /* CS */
134   struct ac_arg local_invocation_ids;
135   struct ac_arg num_work_groups;
136   struct ac_arg workgroup_ids[3];
137   struct ac_arg tg_size;
138
139   /* Vulkan only */
140   struct ac_arg push_constants;
141   struct ac_arg inline_push_consts[AC_MAX_INLINE_PUSH_CONSTS];
142   unsigned base_inline_push_consts;
143   struct ac_arg view_index;
144   struct ac_arg sbt_descriptors;
145   struct ac_arg ray_launch_size;
146};
147
148void ac_add_arg(struct ac_shader_args *info, enum ac_arg_regfile regfile, unsigned registers,
149                enum ac_arg_type type, struct ac_arg *arg);
150void ac_add_return(struct ac_shader_args *info, enum ac_arg_regfile regfile);
151
152#endif
153