pan_sysval.c revision 7ec681f3 
1/*
2 * Copyright (C) 2020 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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors (Collabora):
24 *      Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
25 */
26
27#include "pan_ir.h"
28#include "compiler/nir/nir_builder.h"
29
30/* TODO: ssbo_size */
31static int
32panfrost_sysval_for_ssbo(nir_intrinsic_instr *instr)
33{
34        nir_src index = instr->src[0];
35        assert(nir_src_is_const(index));
36        uint32_t uindex = nir_src_as_uint(index);
37
38        return PAN_SYSVAL(SSBO, uindex);
39}
40
41static int
42panfrost_sysval_for_sampler(nir_intrinsic_instr *instr)
43{
44        /* TODO: indirect samplers !!! */
45        nir_src index = instr->src[0];
46        assert(nir_src_is_const(index));
47        uint32_t uindex = nir_src_as_uint(index);
48
49        return PAN_SYSVAL(SAMPLER, uindex);
50}
51
52static int
53panfrost_sysval_for_image_size(nir_intrinsic_instr *instr)
54{
55        nir_src index = instr->src[0];
56        assert(nir_src_is_const(index));
57
58        bool is_array = nir_intrinsic_image_array(instr);
59        uint32_t uindex = nir_src_as_uint(index);
60        unsigned dim = nir_intrinsic_dest_components(instr) - is_array;
61
62        return PAN_SYSVAL(IMAGE_SIZE, PAN_TXS_SYSVAL_ID(uindex, dim, is_array));
63}
64
65static unsigned
66panfrost_nir_sysval_for_intrinsic(nir_intrinsic_instr *instr)
67{
68        switch (instr->intrinsic) {
69        case nir_intrinsic_load_viewport_scale:
70                return PAN_SYSVAL_VIEWPORT_SCALE;
71        case nir_intrinsic_load_viewport_offset:
72                return PAN_SYSVAL_VIEWPORT_OFFSET;
73        case nir_intrinsic_load_num_workgroups:
74                return PAN_SYSVAL_NUM_WORK_GROUPS;
75        case nir_intrinsic_load_workgroup_size:
76                return PAN_SYSVAL_LOCAL_GROUP_SIZE;
77        case nir_intrinsic_load_work_dim:
78                return PAN_SYSVAL_WORK_DIM;
79        case nir_intrinsic_load_sample_positions_pan:
80                return PAN_SYSVAL_SAMPLE_POSITIONS;
81        case nir_intrinsic_load_first_vertex:
82        case nir_intrinsic_load_base_vertex:
83        case nir_intrinsic_load_base_instance:
84                return PAN_SYSVAL_VERTEX_INSTANCE_OFFSETS;
85        case nir_intrinsic_load_draw_id:
86                return PAN_SYSVAL_DRAWID;
87        case nir_intrinsic_load_ssbo_address:
88        case nir_intrinsic_get_ssbo_size:
89                return panfrost_sysval_for_ssbo(instr);
90        case nir_intrinsic_load_sampler_lod_parameters_pan:
91                return panfrost_sysval_for_sampler(instr);
92        case nir_intrinsic_image_size:
93                return panfrost_sysval_for_image_size(instr);
94        case nir_intrinsic_load_blend_const_color_rgba:
95                return PAN_SYSVAL_BLEND_CONSTANTS;
96        default:
97                return ~0;
98        }
99}
100
101int
102panfrost_sysval_for_instr(nir_instr *instr, nir_dest *dest)
103{
104        nir_intrinsic_instr *intr;
105        nir_dest *dst = NULL;
106        nir_tex_instr *tex;
107        unsigned sysval = ~0;
108
109        switch (instr->type) {
110        case nir_instr_type_intrinsic:
111                intr = nir_instr_as_intrinsic(instr);
112                sysval = panfrost_nir_sysval_for_intrinsic(intr);
113                dst = &intr->dest;
114                break;
115        case nir_instr_type_tex:
116                tex = nir_instr_as_tex(instr);
117                if (tex->op != nir_texop_txs)
118                        break;
119
120                sysval = PAN_SYSVAL(TEXTURE_SIZE,
121                                    PAN_TXS_SYSVAL_ID(tex->texture_index,
122                                                      nir_tex_instr_dest_size(tex) -
123                                                      (tex->is_array ? 1 : 0),
124                                                      tex->is_array));
125                dst  = &tex->dest;
126                break;
127        default:
128                break;
129        }
130
131        if (dest && dst)
132                *dest = *dst;
133
134        return sysval;
135}
136
137unsigned
138pan_lookup_sysval(struct hash_table_u64 *sysval_to_id,
139                  struct panfrost_sysvals *sysvals,
140                  int sysval)
141{
142        /* Try to lookup */
143
144        void *cached = _mesa_hash_table_u64_search(sysval_to_id, sysval);
145
146        if (cached)
147                return ((uintptr_t) cached) - 1;
148
149        /* Else assign */
150
151        unsigned id = sysvals->sysval_count++;
152        assert(id < MAX_SYSVAL_COUNT);
153        _mesa_hash_table_u64_insert(sysval_to_id, sysval, (void *) ((uintptr_t) id + 1));
154        sysvals->sysvals[id] = sysval;
155
156        return id;
157}
158
159struct hash_table_u64 *
160panfrost_init_sysvals(struct panfrost_sysvals *sysvals, void *memctx)
161{
162        sysvals->sysval_count = 0;
163        return _mesa_hash_table_u64_create(memctx);
164}
165