2 * Copyright 2017 Advanced Micro Devices, Inc.
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:
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
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.
26 #include "shaderobj.h"
29 #include "compiler/nir/nir.h"
30 #include "compiler/spirv/nir_spirv.h"
32 #include "program/program.h"
34 #include "util/u_atomic.h"
37 _mesa_spirv_module_reference(struct gl_spirv_module
**dest
,
38 struct gl_spirv_module
*src
)
40 struct gl_spirv_module
*old
= *dest
;
42 if (old
&& p_atomic_dec_zero(&old
->RefCount
))
48 p_atomic_inc(&src
->RefCount
);
52 _mesa_shader_spirv_data_reference(struct gl_shader_spirv_data
**dest
,
53 struct gl_shader_spirv_data
*src
)
55 struct gl_shader_spirv_data
*old
= *dest
;
57 if (old
&& p_atomic_dec_zero(&old
->RefCount
)) {
58 _mesa_spirv_module_reference(&(*dest
)->SpirVModule
, NULL
);
65 p_atomic_inc(&src
->RefCount
);
69 _mesa_spirv_shader_binary(struct gl_context
*ctx
,
70 unsigned n
, struct gl_shader
**shaders
,
71 const void* binary
, size_t length
)
73 struct gl_spirv_module
*module
;
74 struct gl_shader_spirv_data
*spirv_data
;
78 module
= malloc(sizeof(*module
) + length
);
80 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glShaderBinary");
84 p_atomic_set(&module
->RefCount
, 0);
85 module
->Length
= length
;
86 memcpy(&module
->Binary
[0], binary
, length
);
88 for (int i
= 0; i
< n
; ++i
) {
89 struct gl_shader
*sh
= shaders
[i
];
91 spirv_data
= rzalloc(NULL
, struct gl_shader_spirv_data
);
92 _mesa_shader_spirv_data_reference(&sh
->spirv_data
, spirv_data
);
93 _mesa_spirv_module_reference(&spirv_data
->SpirVModule
, module
);
95 sh
->CompileStatus
= COMPILE_FAILURE
;
97 free((void *)sh
->Source
);
99 free((void *)sh
->FallbackSource
);
100 sh
->FallbackSource
= NULL
;
104 ralloc_free(sh
->symbols
);
110 * This is the equivalent to compiler/glsl/linker.cpp::link_shaders()
111 * but for SPIR-V programs.
113 * This method just creates the gl_linked_shader structs with a reference to
114 * the SPIR-V data collected during previous steps.
116 * The real linking happens later in the driver-specifc call LinkShader().
117 * This is so backends can implement different linking strategies for
121 _mesa_spirv_link_shaders(struct gl_context
*ctx
, struct gl_shader_program
*prog
)
123 prog
->data
->LinkStatus
= LINKING_SUCCESS
;
124 prog
->data
->Validated
= false;
126 for (unsigned i
= 0; i
< prog
->NumShaders
; i
++) {
127 struct gl_shader
*shader
= prog
->Shaders
[i
];
128 gl_shader_stage shader_type
= shader
->Stage
;
130 /* We only support one shader per stage. The gl_spirv spec doesn't seem
131 * to prevent this, but the way the API is designed, requiring all shaders
132 * to be specialized with an entry point, makes supporting this quite
135 * TODO: Turn this into a proper error once the spec bug
136 * <https://gitlab.khronos.org/opengl/API/issues/58> is resolved.
138 if (prog
->_LinkedShaders
[shader_type
]) {
139 ralloc_strcat(&prog
->data
->InfoLog
,
140 "\nError trying to link more than one SPIR-V shader "
142 prog
->data
->LinkStatus
= LINKING_FAILURE
;
146 assert(shader
->spirv_data
);
148 struct gl_linked_shader
*linked
= rzalloc(NULL
, struct gl_linked_shader
);
149 linked
->Stage
= shader_type
;
151 /* Create program and attach it to the linked shader */
152 struct gl_program
*gl_prog
=
153 ctx
->Driver
.NewProgram(ctx
,
154 _mesa_shader_stage_to_program(shader_type
),
157 prog
->data
->LinkStatus
= LINKING_FAILURE
;
158 _mesa_delete_linked_shader(ctx
, linked
);
162 _mesa_reference_shader_program_data(ctx
,
166 /* Don't use _mesa_reference_program() just take ownership */
167 linked
->Program
= gl_prog
;
169 /* Reference the SPIR-V data from shader to the linked shader */
170 _mesa_shader_spirv_data_reference(&linked
->spirv_data
,
173 prog
->_LinkedShaders
[shader_type
] = linked
;
174 prog
->data
->linked_stages
|= 1 << shader_type
;
177 int last_vert_stage
=
178 util_last_bit(prog
->data
->linked_stages
&
179 ((1 << (MESA_SHADER_GEOMETRY
+ 1)) - 1));
182 prog
->last_vert_prog
= prog
->_LinkedShaders
[last_vert_stage
- 1]->Program
;
186 _mesa_spirv_to_nir(struct gl_context
*ctx
,
187 const struct gl_shader_program
*prog
,
188 gl_shader_stage stage
,
189 const nir_shader_compiler_options
*options
)
191 nir_shader
*nir
= NULL
;
193 struct gl_linked_shader
*linked_shader
= prog
->_LinkedShaders
[stage
];
194 assert (linked_shader
);
196 struct gl_shader_spirv_data
*spirv_data
= linked_shader
->spirv_data
;
199 struct gl_spirv_module
*spirv_module
= spirv_data
->SpirVModule
;
200 assert (spirv_module
!= NULL
);
202 const char *entry_point_name
= spirv_data
->SpirVEntryPoint
;
203 assert(entry_point_name
);
205 struct nir_spirv_specialization
*spec_entries
=
206 calloc(sizeof(*spec_entries
),
207 spirv_data
->NumSpecializationConstants
);
209 for (unsigned i
= 0; i
< spirv_data
->NumSpecializationConstants
; ++i
) {
210 spec_entries
[i
].id
= spirv_data
->SpecializationConstantsIndex
[i
];
211 spec_entries
[i
].data32
= spirv_data
->SpecializationConstantsValue
[i
];
212 spec_entries
[i
].defined_on_module
= false;
215 const struct spirv_to_nir_options spirv_options
= {
216 .lower_workgroup_access_to_offsets
= true,
217 .caps
= ctx
->Const
.SpirVCapabilities
220 nir_function
*entry_point
=
221 spirv_to_nir((const uint32_t *) &spirv_module
->Binary
[0],
222 spirv_module
->Length
/ 4,
223 spec_entries
, spirv_data
->NumSpecializationConstants
,
224 stage
, entry_point_name
,
229 assert (entry_point
);
230 nir
= entry_point
->shader
;
231 assert(nir
->info
.stage
== stage
);
233 nir
->options
= options
;
236 ralloc_asprintf(nir
, "SPIRV:%s:%d",
237 _mesa_shader_stage_to_abbrev(nir
->info
.stage
),
239 nir_validate_shader(nir
);
241 NIR_PASS_V(nir
, nir_copy_prop
);
243 /* Split member structs. We do this before lower_io_to_temporaries so that
244 * it doesn't lower system values to temporaries by accident.
246 NIR_PASS_V(nir
, nir_split_var_copies
);
247 NIR_PASS_V(nir
, nir_split_per_member_structs
);
253 _mesa_SpecializeShaderARB(GLuint shader
,
254 const GLchar
*pEntryPoint
,
255 GLuint numSpecializationConstants
,
256 const GLuint
*pConstantIndex
,
257 const GLuint
*pConstantValue
)
259 GET_CURRENT_CONTEXT(ctx
);
260 struct gl_shader
*sh
;
261 bool has_entry_point
;
262 struct nir_spirv_specialization
*spec_entries
= NULL
;
264 if (!ctx
->Extensions
.ARB_gl_spirv
) {
265 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glSpecializeShaderARB");
269 sh
= _mesa_lookup_shader_err(ctx
, shader
, "glSpecializeShaderARB");
273 if (!sh
->spirv_data
) {
274 _mesa_error(ctx
, GL_INVALID_OPERATION
,
275 "glSpecializeShaderARB(not SPIR-V)");
279 if (sh
->CompileStatus
) {
280 _mesa_error(ctx
, GL_INVALID_OPERATION
,
281 "glSpecializeShaderARB(already specialized)");
285 struct gl_shader_spirv_data
*spirv_data
= sh
->spirv_data
;
287 /* From the GL_ARB_gl_spirv spec:
289 * "The OpenGL API expects the SPIR-V module to have already been
290 * validated, and can return an error if it discovers anything invalid
291 * in the module. An invalid SPIR-V module is allowed to result in
292 * undefined behavior."
294 * However, the following errors still need to be detected (from the same
297 * "INVALID_VALUE is generated if <pEntryPoint> does not name a valid
298 * entry point for <shader>.
300 * INVALID_VALUE is generated if any element of <pConstantIndex>
301 * refers to a specialization constant that does not exist in the
302 * shader module contained in <shader>."
304 * We cannot flag those errors a-priori because detecting them requires
305 * parsing the module. However, flagging them during specialization is okay,
306 * since it makes no difference in terms of application-visible state.
308 spec_entries
= calloc(sizeof(*spec_entries
), numSpecializationConstants
);
310 for (unsigned i
= 0; i
< numSpecializationConstants
; ++i
) {
311 spec_entries
[i
].id
= pConstantIndex
[i
];
312 spec_entries
[i
].data32
= pConstantValue
[i
];
313 spec_entries
[i
].defined_on_module
= false;
317 gl_spirv_validation((uint32_t *)&spirv_data
->SpirVModule
->Binary
[0],
318 spirv_data
->SpirVModule
->Length
/ 4,
319 spec_entries
, numSpecializationConstants
,
320 sh
->Stage
, pEntryPoint
);
322 /* See previous spec comment */
323 if (!has_entry_point
) {
324 _mesa_error(ctx
, GL_INVALID_VALUE
,
325 "glSpecializeShaderARB(\"%s\" is not a valid entry point"
326 " for shader)", pEntryPoint
);
330 for (unsigned i
= 0; i
< numSpecializationConstants
; ++i
) {
331 if (spec_entries
[i
].defined_on_module
== false) {
332 _mesa_error(ctx
, GL_INVALID_VALUE
,
333 "glSpecializeShaderARB(constant \"%i\" does not exist "
334 "in shader)", spec_entries
[i
].id
);
339 spirv_data
->SpirVEntryPoint
= ralloc_strdup(spirv_data
, pEntryPoint
);
341 /* Note that we didn't make a real compilation of the module (spirv_to_nir),
342 * but just checked some error conditions. Real "compilation" will be done
343 * later, upon linking.
345 sh
->CompileStatus
= COMPILE_SUCCESS
;
347 spirv_data
->NumSpecializationConstants
= numSpecializationConstants
;
348 spirv_data
->SpecializationConstantsIndex
=
349 rzalloc_array_size(spirv_data
, sizeof(GLuint
),
350 numSpecializationConstants
);
351 spirv_data
->SpecializationConstantsValue
=
352 rzalloc_array_size(spirv_data
, sizeof(GLuint
),
353 numSpecializationConstants
);
354 for (unsigned i
= 0; i
< numSpecializationConstants
; ++i
) {
355 spirv_data
->SpecializationConstantsIndex
[i
] = pConstantIndex
[i
];
356 spirv_data
->SpecializationConstantsValue
[i
] = pConstantValue
[i
];