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
29 /* TODO: ssbo_size */
30 static int
panfrost_sysval_for_ssbo(nir_intrinsic_instr * instr)31 panfrost_sysval_for_ssbo(nir_intrinsic_instr *instr)
32 {
33 nir_src index = instr->src[0];
34 assert(nir_src_is_const(index));
35 uint32_t uindex = nir_src_as_uint(index);
36
37 return PAN_SYSVAL(SSBO, uindex);
38 }
39
40 static int
panfrost_sysval_for_sampler(nir_intrinsic_instr * instr)41 panfrost_sysval_for_sampler(nir_intrinsic_instr *instr)
42 {
43 /* TODO: indirect samplers !!! */
44 nir_src index = instr->src[0];
45 assert(nir_src_is_const(index));
46 uint32_t uindex = nir_src_as_uint(index);
47
48 return PAN_SYSVAL(SAMPLER, uindex);
49 }
50
51 static unsigned
panfrost_nir_sysval_for_intrinsic(nir_intrinsic_instr * instr)52 panfrost_nir_sysval_for_intrinsic(nir_intrinsic_instr *instr)
53 {
54 switch (instr->intrinsic) {
55 case nir_intrinsic_load_viewport_scale:
56 return PAN_SYSVAL_VIEWPORT_SCALE;
57 case nir_intrinsic_load_viewport_offset:
58 return PAN_SYSVAL_VIEWPORT_OFFSET;
59 case nir_intrinsic_load_num_work_groups:
60 return PAN_SYSVAL_NUM_WORK_GROUPS;
61 case nir_intrinsic_load_ssbo_address:
62 case nir_intrinsic_get_ssbo_size:
63 return panfrost_sysval_for_ssbo(instr);
64 case nir_intrinsic_load_sampler_lod_parameters_pan:
65 return panfrost_sysval_for_sampler(instr);
66 default:
67 return ~0;
68 }
69 }
70
71 int
panfrost_sysval_for_instr(nir_instr * instr,nir_dest * dest)72 panfrost_sysval_for_instr(nir_instr *instr, nir_dest *dest)
73 {
74 nir_intrinsic_instr *intr;
75 nir_dest *dst = NULL;
76 nir_tex_instr *tex;
77 unsigned sysval = ~0;
78
79 switch (instr->type) {
80 case nir_instr_type_intrinsic:
81 intr = nir_instr_as_intrinsic(instr);
82 sysval = panfrost_nir_sysval_for_intrinsic(intr);
83 dst = &intr->dest;
84 break;
85 case nir_instr_type_tex:
86 tex = nir_instr_as_tex(instr);
87 if (tex->op != nir_texop_txs)
88 break;
89
90 sysval = PAN_SYSVAL(TEXTURE_SIZE,
91 PAN_TXS_SYSVAL_ID(tex->texture_index,
92 nir_tex_instr_dest_size(tex) -
93 (tex->is_array ? 1 : 0),
94 tex->is_array));
95 dst = &tex->dest;
96 break;
97 default:
98 break;
99 }
100
101 if (dest && dst)
102 *dest = *dst;
103
104 return sysval;
105 }
106
107 static void
panfrost_nir_assign_sysval_body(struct panfrost_sysvals * ctx,nir_instr * instr)108 panfrost_nir_assign_sysval_body(struct panfrost_sysvals *ctx, nir_instr *instr)
109 {
110 int sysval = panfrost_sysval_for_instr(instr, NULL);
111 if (sysval < 0)
112 return;
113
114 /* We have a sysval load; check if it's already been assigned */
115
116 if (_mesa_hash_table_u64_search(ctx->sysval_to_id, sysval))
117 return;
118
119 /* It hasn't -- so assign it now! */
120
121 unsigned id = ctx->sysval_count++;
122 _mesa_hash_table_u64_insert(ctx->sysval_to_id, sysval, (void *) ((uintptr_t) id + 1));
123 ctx->sysvals[id] = sysval;
124 }
125
126 void
panfrost_nir_assign_sysvals(struct panfrost_sysvals * ctx,void * memctx,nir_shader * shader)127 panfrost_nir_assign_sysvals(struct panfrost_sysvals *ctx, void *memctx, nir_shader *shader)
128 {
129 ctx->sysval_count = 0;
130 ctx->sysval_to_id = _mesa_hash_table_u64_create(memctx);
131
132 nir_foreach_function(function, shader) {
133 if (!function->impl) continue;
134
135 nir_foreach_block(block, function->impl) {
136 nir_foreach_instr_safe(instr, block) {
137 panfrost_nir_assign_sysval_body(ctx, instr);
138 }
139 }
140 }
141 }
142