1/*
2 * Copyright (C) 2021 Alyssa Rosenzweig
3 * Copyright (C) 2020-2021 Collabora, Ltd.
4 * Copyright (C) 2014 Broadcom
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 */
25
26#include "agx_state.h"
27#include "compiler/nir/nir_builder.h"
28#include "asahi/compiler/agx_compile.h"
29#include "gallium/auxiliary/util/u_blitter.h"
30
31static void
32agx_build_reload_shader(struct agx_device *dev)
33{
34   nir_builder b = nir_builder_init_simple_shader(MESA_SHADER_FRAGMENT,
35         &agx_nir_options, "agx_reload");
36
37   nir_variable *out = nir_variable_create(b.shader, nir_var_shader_out,
38         glsl_vector_type(GLSL_TYPE_FLOAT, 4), "output");
39   out->data.location = FRAG_RESULT_DATA0;
40
41   nir_ssa_def *fragcoord = nir_load_frag_coord(&b);
42   nir_ssa_def *coord = nir_channels(&b, fragcoord, 0x3);
43
44   nir_tex_instr *tex = nir_tex_instr_create(b.shader, 1);
45   tex->dest_type = nir_type_float32;
46   tex->sampler_dim = GLSL_SAMPLER_DIM_RECT;
47   tex->op = nir_texop_tex;
48   tex->src[0].src_type = nir_tex_src_coord;
49   tex->src[0].src = nir_src_for_ssa(coord);
50   tex->coord_components = 2;
51   nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, NULL);
52   nir_builder_instr_insert(&b, &tex->instr);
53   nir_store_var(&b, out, &tex->dest.ssa, 0xFF);
54
55   unsigned offset = 0;
56   unsigned bo_size = 4096;
57
58   struct agx_bo *bo = agx_bo_create(dev, bo_size, AGX_MEMORY_TYPE_SHADER);
59   dev->reload.bo = bo;
60
61   for (unsigned i = 0; i < AGX_NUM_FORMATS; ++i) {
62      struct util_dynarray binary;
63      util_dynarray_init(&binary, NULL);
64
65      nir_shader *s = nir_shader_clone(NULL, b.shader);
66      struct agx_shader_info info;
67
68      struct agx_shader_key key = {
69         .fs.tib_formats[0] = i
70      };
71
72      agx_compile_shader_nir(s, &key, &binary, &info);
73
74      assert(offset + binary.size < bo_size);
75      memcpy(((uint8_t *) bo->ptr.cpu) + offset, binary.data, binary.size);
76
77      dev->reload.format[i] = bo->ptr.gpu + offset;
78      offset += ALIGN_POT(binary.size, 128);
79
80      util_dynarray_fini(&binary);
81   }
82}
83
84static void
85agx_blitter_save(struct agx_context *ctx, struct blitter_context *blitter,
86                 bool render_cond)
87{
88   util_blitter_save_vertex_buffer_slot(blitter, ctx->vertex_buffers);
89   util_blitter_save_vertex_elements(blitter, ctx->attributes);
90   util_blitter_save_vertex_shader(blitter, ctx->stage[PIPE_SHADER_VERTEX].shader);
91   util_blitter_save_rasterizer(blitter, ctx->rast);
92   util_blitter_save_viewport(blitter, &ctx->viewport);
93   util_blitter_save_scissor(blitter, &ctx->scissor);
94   util_blitter_save_fragment_shader(blitter, ctx->stage[PIPE_SHADER_FRAGMENT].shader);
95   util_blitter_save_blend(blitter, ctx->blend);
96   util_blitter_save_depth_stencil_alpha(blitter, &ctx->zs);
97   util_blitter_save_stencil_ref(blitter, &ctx->stencil_ref);
98   util_blitter_save_so_targets(blitter, 0, NULL);
99   util_blitter_save_sample_mask(blitter, ctx->sample_mask, 0);
100
101   util_blitter_save_framebuffer(blitter, &ctx->framebuffer);
102   util_blitter_save_fragment_sampler_states(blitter,
103         ctx->stage[PIPE_SHADER_FRAGMENT].sampler_count,
104         (void **)(ctx->stage[PIPE_SHADER_FRAGMENT].samplers));
105   util_blitter_save_fragment_sampler_views(blitter,
106         ctx->stage[PIPE_SHADER_FRAGMENT].texture_count,
107         (struct pipe_sampler_view **)ctx->stage[PIPE_SHADER_FRAGMENT].textures);
108   util_blitter_save_fragment_constant_buffer_slot(blitter,
109         ctx->stage[PIPE_SHADER_FRAGMENT].cb);
110
111   if (!render_cond) {
112      util_blitter_save_render_condition(blitter,
113            (struct pipe_query *) ctx->cond_query,
114            ctx->cond_cond, ctx->cond_mode);
115   }
116}
117
118void
119agx_blit(struct pipe_context *pipe,
120              const struct pipe_blit_info *info)
121{
122   //if (info->render_condition_enable &&
123   //    !agx_render_condition_check(pan_context(pipe)))
124   //        return;
125
126   struct agx_context *ctx = agx_context(pipe);
127
128   if (!util_blitter_is_blit_supported(ctx->blitter, info))
129      unreachable("Unsupported blit\n");
130
131   agx_blitter_save(ctx, ctx->blitter, info->render_condition_enable);
132   util_blitter_blit(ctx->blitter, info);
133}
134
135/* We need some fixed shaders for common rendering tasks. When colour buffer
136 * reload is not in use, a shader is used to clear a particular colour. At the
137 * end of rendering a tile, a shader is used to write it out. These shaders are
138 * too trivial to go through the compiler at this stage. */
139#define AGX_STOP \
140	0x88, 0x00, 0x08, 0x00, 0x08, 0x00, 0x08, 0x00, 0x08, \
141	0x00, 0x08, 0x00, 0x08, 0x00, 0x08, 0x00, 0x08, 0x00 \
142
143#define AGX_BLEND \
144	0x09, 0x00, 0x00, 0x04, 0xf0, 0xfc, 0x80, 0x03
145
146/* Clears the tilebuffer, where u6-u7 are preloaded with the FP16 clear colour
147
148   0: 7e018c098040         bitop_mov        r0, u6
149   6: 7e058e098000         bitop_mov        r1, u7
150   c: 09000004f0fc8003     TODO.blend
151   */
152
153static uint8_t shader_clear[] = {
154   0x7e, 0x01, 0x8c, 0x09, 0x80, 0x40,
155   0x7e, 0x05, 0x8e, 0x09, 0x80, 0x00,
156   AGX_BLEND,
157   AGX_STOP
158};
159
160static uint8_t shader_store[] = {
161   0x7e, 0x00, 0x04, 0x09, 0x80, 0x00,
162   0xb1, 0x80, 0x00, 0x80, 0x00, 0x4a, 0x00, 0x00, 0x0a, 0x00,
163   AGX_STOP
164};
165
166void
167agx_internal_shaders(struct agx_device *dev)
168{
169   unsigned clear_offset = 0;
170   unsigned store_offset = 1024;
171
172   struct agx_bo *bo = agx_bo_create(dev, 4096, AGX_MEMORY_TYPE_SHADER);
173   memcpy(((uint8_t *) bo->ptr.cpu) + clear_offset, shader_clear, sizeof(shader_clear));
174   memcpy(((uint8_t *) bo->ptr.cpu) + store_offset, shader_store, sizeof(shader_store));
175
176   dev->internal.bo = bo;
177   dev->internal.clear = bo->ptr.gpu + clear_offset;
178   dev->internal.store = bo->ptr.gpu + store_offset;
179
180   agx_build_reload_shader(dev);
181}
182