2 * Copyright 2013 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.
25 #include "util/u_memory.h"
26 #include "radeon/r600_pipe_common.h"
27 #include "radeon/radeon_elf_util.h"
28 #include "radeon/radeon_llvm_util.h"
30 #include "radeon/r600_cs.h"
32 #include "si_shader.h"
35 #define MAX_GLOBAL_BUFFERS 20
38 struct si_context
*ctx
;
41 unsigned private_size
;
43 struct si_shader shader
;
44 unsigned num_user_sgprs
;
46 struct r600_resource
*input_buffer
;
47 struct pipe_resource
*global_buffers
[MAX_GLOBAL_BUFFERS
];
49 #if HAVE_LLVM < 0x0306
51 struct si_shader
*kernels
;
52 LLVMContextRef llvm_ctx
;
56 static void init_scratch_buffer(struct si_context
*sctx
, struct si_compute
*program
)
58 unsigned scratch_bytes
= 0;
59 uint64_t scratch_buffer_va
;
62 /* Compute the scratch buffer size using the maximum number of waves.
63 * This way we don't need to recompute it for each kernel launch. */
64 unsigned scratch_waves
= 32 * sctx
->screen
->b
.info
.num_good_compute_units
;
65 for (i
= 0; i
< program
->shader
.binary
.global_symbol_count
; i
++) {
67 program
->shader
.binary
.global_symbol_offsets
[i
];
68 unsigned scratch_bytes_needed
;
70 si_shader_binary_read_config(&program
->shader
.binary
,
71 &program
->shader
.config
, offset
);
72 scratch_bytes_needed
= program
->shader
.config
.scratch_bytes_per_wave
;
73 scratch_bytes
= MAX2(scratch_bytes
, scratch_bytes_needed
);
76 if (scratch_bytes
== 0)
79 program
->shader
.scratch_bo
=
80 si_resource_create_custom(sctx
->b
.b
.screen
,
82 scratch_bytes
* scratch_waves
);
84 scratch_buffer_va
= program
->shader
.scratch_bo
->gpu_address
;
86 /* apply_scratch_relocs needs scratch_bytes_per_wave to be set
87 * to the maximum bytes needed, so it can compute the stride
90 program
->shader
.config
.scratch_bytes_per_wave
= scratch_bytes
;
92 /* Patch the shader with the scratch buffer address. */
93 si_shader_apply_scratch_relocs(sctx
,
94 &program
->shader
, scratch_buffer_va
);
97 static void *si_create_compute_state(
98 struct pipe_context
*ctx
,
99 const struct pipe_compute_state
*cso
)
101 struct si_context
*sctx
= (struct si_context
*)ctx
;
102 struct si_compute
*program
= CALLOC_STRUCT(si_compute
);
103 const struct pipe_llvm_program_header
*header
;
107 code
= cso
->prog
+ sizeof(struct pipe_llvm_program_header
);
110 program
->local_size
= cso
->req_local_mem
;
111 program
->private_size
= cso
->req_private_mem
;
112 program
->input_size
= cso
->req_input_mem
;
114 #if HAVE_LLVM < 0x0306
117 program
->llvm_ctx
= LLVMContextCreate();
118 program
->num_kernels
= radeon_llvm_get_num_kernels(program
->llvm_ctx
,
119 code
, header
->num_bytes
);
120 program
->kernels
= CALLOC(sizeof(struct si_shader
),
121 program
->num_kernels
);
122 for (i
= 0; i
< program
->num_kernels
; i
++) {
123 LLVMModuleRef mod
= radeon_llvm_get_kernel_module(program
->llvm_ctx
, i
,
124 code
, header
->num_bytes
);
125 si_compile_llvm(sctx
->screen
, &program
->kernels
[i
].binary
,
126 &program
->kernels
[i
].config
, sctx
->tm
,
127 mod
, &sctx
->b
.debug
, TGSI_PROCESSOR_COMPUTE
);
128 si_shader_dump(sctx
->screen
, &program
->kernels
[i
],
129 &sctx
->b
.debug
, TGSI_PROCESSOR_COMPUTE
);
130 si_shader_binary_upload(sctx
->screen
, &program
->kernels
[i
]);
131 LLVMDisposeModule(mod
);
136 radeon_elf_read(code
, header
->num_bytes
, &program
->shader
.binary
);
138 /* init_scratch_buffer patches the shader code with the scratch address,
139 * so we need to call it before si_shader_binary_read() which uploads
140 * the shader code to the GPU.
142 init_scratch_buffer(sctx
, program
);
143 si_shader_binary_read_config(&program
->shader
.binary
,
144 &program
->shader
.config
, 0);
145 si_shader_dump(sctx
->screen
, &program
->shader
, &sctx
->b
.debug
,
146 TGSI_PROCESSOR_COMPUTE
);
147 si_shader_binary_upload(sctx
->screen
, &program
->shader
);
150 program
->input_buffer
= si_resource_create_custom(sctx
->b
.b
.screen
,
151 PIPE_USAGE_IMMUTABLE
, program
->input_size
);
156 static void si_bind_compute_state(struct pipe_context
*ctx
, void *state
)
158 struct si_context
*sctx
= (struct si_context
*)ctx
;
159 sctx
->cs_shader_state
.program
= (struct si_compute
*)state
;
162 static void si_set_global_binding(
163 struct pipe_context
*ctx
, unsigned first
, unsigned n
,
164 struct pipe_resource
**resources
,
168 struct si_context
*sctx
= (struct si_context
*)ctx
;
169 struct si_compute
*program
= sctx
->cs_shader_state
.program
;
172 for (i
= first
; i
< first
+ n
; i
++) {
173 pipe_resource_reference(&program
->global_buffers
[i
], NULL
);
178 for (i
= first
; i
< first
+ n
; i
++) {
181 pipe_resource_reference(&program
->global_buffers
[i
], resources
[i
]);
182 va
= r600_resource(resources
[i
])->gpu_address
;
183 offset
= util_le32_to_cpu(*handles
[i
]);
185 va
= util_cpu_to_le64(va
);
186 memcpy(handles
[i
], &va
, sizeof(va
));
191 * This function computes the value for R_00B860_COMPUTE_TMPRING_SIZE.WAVES
192 * /p block_layout is the number of threads in each work group.
193 * /p grid layout is the number of work groups.
195 static unsigned compute_num_waves_for_scratch(
196 const struct radeon_info
*info
,
197 const uint
*block_layout
,
198 const uint
*grid_layout
)
200 unsigned num_sh
= MAX2(info
->max_sh_per_se
, 1);
201 unsigned num_se
= MAX2(info
->max_se
, 1);
202 unsigned num_blocks
= 1;
203 unsigned threads_per_block
= 1;
204 unsigned waves_per_block
;
205 unsigned waves_per_sh
;
207 unsigned scratch_waves
;
210 for (i
= 0; i
< 3; i
++) {
211 threads_per_block
*= block_layout
[i
];
212 num_blocks
*= grid_layout
[i
];
215 waves_per_block
= align(threads_per_block
, 64) / 64;
216 waves
= waves_per_block
* num_blocks
;
217 waves_per_sh
= align(waves
, num_sh
* num_se
) / (num_sh
* num_se
);
218 scratch_waves
= waves_per_sh
* num_sh
* num_se
;
220 if (waves_per_block
> waves_per_sh
) {
221 scratch_waves
= waves_per_block
* num_sh
* num_se
;
224 return scratch_waves
;
227 static void si_launch_grid(
228 struct pipe_context
*ctx
,
229 const uint
*block_layout
, const uint
*grid_layout
,
230 uint32_t pc
, const void *input
)
232 struct si_context
*sctx
= (struct si_context
*)ctx
;
233 struct radeon_winsys_cs
*cs
= sctx
->b
.gfx
.cs
;
234 struct si_compute
*program
= sctx
->cs_shader_state
.program
;
235 struct si_pm4_state
*pm4
= CALLOC_STRUCT(si_pm4_state
);
236 struct r600_resource
*input_buffer
= program
->input_buffer
;
237 unsigned kernel_args_size
;
238 unsigned num_work_size_bytes
= 36;
239 uint32_t kernel_args_offset
= 0;
240 uint32_t *kernel_args
;
241 uint64_t kernel_args_va
;
242 uint64_t scratch_buffer_va
= 0;
245 struct si_shader
*shader
= &program
->shader
;
247 unsigned num_waves_for_scratch
;
249 #if HAVE_LLVM < 0x0306
250 shader
= &program
->kernels
[pc
];
254 radeon_emit(cs
, PKT3(PKT3_CONTEXT_CONTROL
, 1, 0) | PKT3_SHADER_TYPE_S(1));
255 radeon_emit(cs
, 0x80000000);
256 radeon_emit(cs
, 0x80000000);
258 sctx
->b
.flags
|= SI_CONTEXT_INV_VMEM_L1
|
259 SI_CONTEXT_INV_GLOBAL_L2
|
260 SI_CONTEXT_INV_ICACHE
|
261 SI_CONTEXT_INV_SMEM_L1
|
262 SI_CONTEXT_FLUSH_WITH_INV_L2
|
263 SI_CONTEXT_FLAG_COMPUTE
;
264 si_emit_cache_flush(sctx
, NULL
);
266 pm4
->compute_pkt
= true;
268 #if HAVE_LLVM >= 0x0306
269 /* Read the config information */
270 si_shader_binary_read_config(&shader
->binary
, &shader
->config
, pc
);
273 /* Upload the kernel arguments */
275 /* The extra num_work_size_bytes are for work group / work item size information */
276 kernel_args_size
= program
->input_size
+ num_work_size_bytes
+ 8 /* For scratch va */;
278 kernel_args
= sctx
->b
.ws
->buffer_map(input_buffer
->buf
,
279 sctx
->b
.gfx
.cs
, PIPE_TRANSFER_WRITE
);
280 for (i
= 0; i
< 3; i
++) {
281 kernel_args
[i
] = grid_layout
[i
];
282 kernel_args
[i
+ 3] = grid_layout
[i
] * block_layout
[i
];
283 kernel_args
[i
+ 6] = block_layout
[i
];
286 num_waves_for_scratch
= compute_num_waves_for_scratch(
287 &sctx
->screen
->b
.info
, block_layout
, grid_layout
);
289 memcpy(kernel_args
+ (num_work_size_bytes
/ 4), input
, program
->input_size
);
291 if (shader
->config
.scratch_bytes_per_wave
> 0) {
293 COMPUTE_DBG(sctx
->screen
, "Waves: %u; Scratch per wave: %u bytes; "
294 "Total Scratch: %u bytes\n", num_waves_for_scratch
,
295 shader
->config
.scratch_bytes_per_wave
,
296 shader
->config
.scratch_bytes_per_wave
*
297 num_waves_for_scratch
);
299 radeon_add_to_buffer_list(&sctx
->b
, &sctx
->b
.gfx
,
301 RADEON_USAGE_READWRITE
,
302 RADEON_PRIO_SCRATCH_BUFFER
);
304 scratch_buffer_va
= shader
->scratch_bo
->gpu_address
;
307 for (i
= 0; i
< (kernel_args_size
/ 4); i
++) {
308 COMPUTE_DBG(sctx
->screen
, "input %u : %u\n", i
,
312 kernel_args_va
= input_buffer
->gpu_address
;
313 kernel_args_va
+= kernel_args_offset
;
315 radeon_add_to_buffer_list(&sctx
->b
, &sctx
->b
.gfx
, input_buffer
,
316 RADEON_USAGE_READ
, RADEON_PRIO_CONST_BUFFER
);
318 si_pm4_set_reg(pm4
, R_00B900_COMPUTE_USER_DATA_0
, kernel_args_va
);
319 si_pm4_set_reg(pm4
, R_00B900_COMPUTE_USER_DATA_0
+ 4, S_008F04_BASE_ADDRESS_HI (kernel_args_va
>> 32) | S_008F04_STRIDE(0));
320 si_pm4_set_reg(pm4
, R_00B900_COMPUTE_USER_DATA_0
+ 8, scratch_buffer_va
);
321 si_pm4_set_reg(pm4
, R_00B900_COMPUTE_USER_DATA_0
+ 12,
322 S_008F04_BASE_ADDRESS_HI(scratch_buffer_va
>> 32)
323 | S_008F04_STRIDE(shader
->config
.scratch_bytes_per_wave
/ 64));
325 si_pm4_set_reg(pm4
, R_00B810_COMPUTE_START_X
, 0);
326 si_pm4_set_reg(pm4
, R_00B814_COMPUTE_START_Y
, 0);
327 si_pm4_set_reg(pm4
, R_00B818_COMPUTE_START_Z
, 0);
329 si_pm4_set_reg(pm4
, R_00B81C_COMPUTE_NUM_THREAD_X
,
330 S_00B81C_NUM_THREAD_FULL(block_layout
[0]));
331 si_pm4_set_reg(pm4
, R_00B820_COMPUTE_NUM_THREAD_Y
,
332 S_00B820_NUM_THREAD_FULL(block_layout
[1]));
333 si_pm4_set_reg(pm4
, R_00B824_COMPUTE_NUM_THREAD_Z
,
334 S_00B824_NUM_THREAD_FULL(block_layout
[2]));
337 for (i
= 0; i
< MAX_GLOBAL_BUFFERS
; i
++) {
338 struct r600_resource
*buffer
=
339 (struct r600_resource
*)program
->global_buffers
[i
];
343 radeon_add_to_buffer_list(&sctx
->b
, &sctx
->b
.gfx
, buffer
,
344 RADEON_USAGE_READWRITE
,
345 RADEON_PRIO_COMPUTE_GLOBAL
);
348 /* This register has been moved to R_00CD20_COMPUTE_MAX_WAVE_ID
349 * and is now per pipe, so it should be handled in the
350 * kernel if we want to use something other than the default value,
351 * which is now 0x22f.
353 if (sctx
->b
.chip_class
<= SI
) {
354 /* XXX: This should be:
355 * (number of compute units) * 4 * (waves per simd) - 1 */
357 si_pm4_set_reg(pm4
, R_00B82C_COMPUTE_MAX_WAVE_ID
,
358 0x190 /* Default value */);
361 shader_va
= shader
->bo
->gpu_address
;
363 #if HAVE_LLVM >= 0x0306
366 radeon_add_to_buffer_list(&sctx
->b
, &sctx
->b
.gfx
, shader
->bo
,
367 RADEON_USAGE_READ
, RADEON_PRIO_USER_SHADER
);
368 si_pm4_set_reg(pm4
, R_00B830_COMPUTE_PGM_LO
, shader_va
>> 8);
369 si_pm4_set_reg(pm4
, R_00B834_COMPUTE_PGM_HI
, shader_va
>> 40);
371 si_pm4_set_reg(pm4
, R_00B848_COMPUTE_PGM_RSRC1
, shader
->config
.rsrc1
);
373 lds_blocks
= shader
->config
.lds_size
;
374 /* XXX: We are over allocating LDS. For SI, the shader reports LDS in
375 * blocks of 256 bytes, so if there are 4 bytes lds allocated in
376 * the shader and 4 bytes allocated by the state tracker, then
377 * we will set LDS_SIZE to 512 bytes rather than 256.
379 if (sctx
->b
.chip_class
<= SI
) {
380 lds_blocks
+= align(program
->local_size
, 256) >> 8;
382 lds_blocks
+= align(program
->local_size
, 512) >> 9;
385 assert(lds_blocks
<= 0xFF);
387 shader
->config
.rsrc2
&= C_00B84C_LDS_SIZE
;
388 shader
->config
.rsrc2
|= S_00B84C_LDS_SIZE(lds_blocks
);
390 si_pm4_set_reg(pm4
, R_00B84C_COMPUTE_PGM_RSRC2
, shader
->config
.rsrc2
);
391 si_pm4_set_reg(pm4
, R_00B854_COMPUTE_RESOURCE_LIMITS
, 0);
393 si_pm4_set_reg(pm4
, R_00B858_COMPUTE_STATIC_THREAD_MGMT_SE0
,
394 S_00B858_SH0_CU_EN(0xffff /* Default value */)
395 | S_00B858_SH1_CU_EN(0xffff /* Default value */))
398 si_pm4_set_reg(pm4
, R_00B85C_COMPUTE_STATIC_THREAD_MGMT_SE1
,
399 S_00B85C_SH0_CU_EN(0xffff /* Default value */)
400 | S_00B85C_SH1_CU_EN(0xffff /* Default value */))
403 num_waves_for_scratch
=
404 MIN2(num_waves_for_scratch
,
405 32 * sctx
->screen
->b
.info
.num_good_compute_units
);
406 si_pm4_set_reg(pm4
, R_00B860_COMPUTE_TMPRING_SIZE
,
407 /* The maximum value for WAVES is 32 * num CU.
408 * If you program this value incorrectly, the GPU will hang if
409 * COMPUTE_PGM_RSRC2.SCRATCH_EN is enabled.
411 S_00B860_WAVES(num_waves_for_scratch
)
412 | S_00B860_WAVESIZE(shader
->config
.scratch_bytes_per_wave
>> 10))
415 si_pm4_cmd_begin(pm4
, PKT3_DISPATCH_DIRECT
);
416 si_pm4_cmd_add(pm4
, grid_layout
[0]); /* Thread groups DIM_X */
417 si_pm4_cmd_add(pm4
, grid_layout
[1]); /* Thread groups DIM_Y */
418 si_pm4_cmd_add(pm4
, grid_layout
[2]); /* Thread gropus DIM_Z */
419 si_pm4_cmd_add(pm4
, 1); /* DISPATCH_INITIATOR */
420 si_pm4_cmd_end(pm4
, false);
422 si_pm4_emit(sctx
, pm4
);
425 fprintf(stderr
, "cdw: %i\n", sctx
->cs
->cdw
);
426 for (i
= 0; i
< sctx
->cs
->cdw
; i
++) {
427 fprintf(stderr
, "%4i : 0x%08X\n", i
, sctx
->cs
->buf
[i
]);
431 si_pm4_free_state(sctx
, pm4
, ~0);
433 sctx
->b
.flags
|= SI_CONTEXT_CS_PARTIAL_FLUSH
|
434 SI_CONTEXT_INV_VMEM_L1
|
435 SI_CONTEXT_INV_GLOBAL_L2
|
436 SI_CONTEXT_INV_ICACHE
|
437 SI_CONTEXT_INV_SMEM_L1
|
438 SI_CONTEXT_FLAG_COMPUTE
;
439 si_emit_cache_flush(sctx
, NULL
);
443 static void si_delete_compute_state(struct pipe_context
*ctx
, void* state
){
444 struct si_compute
*program
= (struct si_compute
*)state
;
450 #if HAVE_LLVM < 0x0306
451 if (program
->kernels
) {
452 for (int i
= 0; i
< program
->num_kernels
; i
++){
453 if (program
->kernels
[i
].bo
){
454 si_shader_destroy(&program
->kernels
[i
]);
457 FREE(program
->kernels
);
460 if (program
->llvm_ctx
){
461 LLVMContextDispose(program
->llvm_ctx
);
464 FREE(program
->shader
.binary
.config
);
465 FREE(program
->shader
.binary
.rodata
);
466 FREE(program
->shader
.binary
.global_symbol_offsets
);
467 si_shader_destroy(&program
->shader
);
470 pipe_resource_reference(
471 (struct pipe_resource
**)&program
->input_buffer
, NULL
);
476 static void si_set_compute_resources(struct pipe_context
* ctx_
,
477 unsigned start
, unsigned count
,
478 struct pipe_surface
** surfaces
) { }
480 void si_init_compute_functions(struct si_context
*sctx
)
482 sctx
->b
.b
.create_compute_state
= si_create_compute_state
;
483 sctx
->b
.b
.delete_compute_state
= si_delete_compute_state
;
484 sctx
->b
.b
.bind_compute_state
= si_bind_compute_state
;
485 /* ctx->context.create_sampler_view = evergreen_compute_create_sampler_view; */
486 sctx
->b
.b
.set_compute_resources
= si_set_compute_resources
;
487 sctx
->b
.b
.set_global_binding
= si_set_global_binding
;
488 sctx
->b
.b
.launch_grid
= si_launch_grid
;