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"
27 #include "radeon/r600_cs.h"
29 #include "si_shader.h"
32 #include "radeon/radeon_llvm_util.h"
34 #define MAX_GLOBAL_BUFFERS 20
35 #if HAVE_LLVM < 0x0305
36 #define NUM_USER_SGPRS 2
38 #define NUM_USER_SGPRS 4
42 struct si_context
*ctx
;
45 unsigned private_size
;
48 struct si_shader
*kernels
;
49 unsigned num_user_sgprs
;
51 struct r600_resource
*input_buffer
;
52 struct pipe_resource
*global_buffers
[MAX_GLOBAL_BUFFERS
];
54 LLVMContextRef llvm_ctx
;
57 static void *si_create_compute_state(
58 struct pipe_context
*ctx
,
59 const struct pipe_compute_state
*cso
)
61 struct si_context
*sctx
= (struct si_context
*)ctx
;
62 struct si_compute
*program
= CALLOC_STRUCT(si_compute
);
63 const struct pipe_llvm_program_header
*header
;
64 const unsigned char *code
;
67 program
->llvm_ctx
= LLVMContextCreate();
70 code
= cso
->prog
+ sizeof(struct pipe_llvm_program_header
);
73 program
->local_size
= cso
->req_local_mem
;
74 program
->private_size
= cso
->req_private_mem
;
75 program
->input_size
= cso
->req_input_mem
;
77 program
->num_kernels
= radeon_llvm_get_num_kernels(program
->llvm_ctx
, code
,
79 program
->kernels
= CALLOC(sizeof(struct si_shader
),
80 program
->num_kernels
);
81 for (i
= 0; i
< program
->num_kernels
; i
++) {
82 LLVMModuleRef mod
= radeon_llvm_get_kernel_module(program
->llvm_ctx
, i
,
83 code
, header
->num_bytes
);
84 si_compile_llvm(sctx
->screen
, &program
->kernels
[i
], mod
);
85 LLVMDisposeModule(mod
);
88 program
->input_buffer
= si_resource_create_custom(sctx
->b
.b
.screen
,
89 PIPE_USAGE_IMMUTABLE
, program
->input_size
);
94 static void si_bind_compute_state(struct pipe_context
*ctx
, void *state
)
96 struct si_context
*sctx
= (struct si_context
*)ctx
;
97 sctx
->cs_shader_state
.program
= (struct si_compute
*)state
;
100 static void si_set_global_binding(
101 struct pipe_context
*ctx
, unsigned first
, unsigned n
,
102 struct pipe_resource
**resources
,
106 struct si_context
*sctx
= (struct si_context
*)ctx
;
107 struct si_compute
*program
= sctx
->cs_shader_state
.program
;
110 for (i
= first
; i
< first
+ n
; i
++) {
111 pipe_resource_reference(&program
->global_buffers
[i
], NULL
);
116 for (i
= first
; i
< first
+ n
; i
++) {
119 pipe_resource_reference(&program
->global_buffers
[i
], resources
[i
]);
120 va
= r600_resource(resources
[i
])->gpu_address
;
121 offset
= util_le32_to_cpu(*handles
[i
]);
123 va
= util_cpu_to_le64(va
);
124 memcpy(handles
[i
], &va
, sizeof(va
));
129 * This function computes the value for R_00B860_COMPUTE_TMPRING_SIZE.WAVES
130 * /p block_layout is the number of threads in each work group.
131 * /p grid layout is the number of work groups.
133 static unsigned compute_num_waves_for_scratch(
134 const struct radeon_info
*info
,
135 const uint
*block_layout
,
136 const uint
*grid_layout
)
138 unsigned num_sh
= MAX2(info
->max_sh_per_se
, 1);
139 unsigned num_se
= MAX2(info
->max_se
, 1);
140 unsigned num_blocks
= 1;
141 unsigned threads_per_block
= 1;
142 unsigned waves_per_block
;
143 unsigned waves_per_sh
;
145 unsigned scratch_waves
;
148 for (i
= 0; i
< 3; i
++) {
149 threads_per_block
*= block_layout
[i
];
150 num_blocks
*= grid_layout
[i
];
153 waves_per_block
= align(threads_per_block
, 64) / 64;
154 waves
= waves_per_block
* num_blocks
;
155 waves_per_sh
= align(waves
, num_sh
* num_se
) / (num_sh
* num_se
);
156 scratch_waves
= waves_per_sh
* num_sh
* num_se
;
158 if (waves_per_block
> waves_per_sh
) {
159 scratch_waves
= waves_per_block
* num_sh
* num_se
;
162 return scratch_waves
;
165 static void si_launch_grid(
166 struct pipe_context
*ctx
,
167 const uint
*block_layout
, const uint
*grid_layout
,
168 uint32_t pc
, const void *input
)
170 struct si_context
*sctx
= (struct si_context
*)ctx
;
171 struct radeon_winsys_cs
*cs
= sctx
->b
.rings
.gfx
.cs
;
172 struct si_compute
*program
= sctx
->cs_shader_state
.program
;
173 struct si_pm4_state
*pm4
= CALLOC_STRUCT(si_pm4_state
);
174 struct r600_resource
*input_buffer
= program
->input_buffer
;
175 unsigned kernel_args_size
;
176 unsigned num_work_size_bytes
= 36;
177 uint32_t kernel_args_offset
= 0;
178 uint32_t *kernel_args
;
179 uint64_t kernel_args_va
;
180 uint64_t scratch_buffer_va
= 0;
182 unsigned arg_user_sgpr_count
= NUM_USER_SGPRS
;
184 struct si_shader
*shader
= &program
->kernels
[pc
];
186 unsigned num_waves_for_scratch
;
188 radeon_emit(cs
, PKT3(PKT3_CONTEXT_CONTROL
, 1, 0) | PKT3_SHADER_TYPE_S(1));
189 radeon_emit(cs
, 0x80000000);
190 radeon_emit(cs
, 0x80000000);
192 pm4
->compute_pkt
= true;
194 si_pm4_cmd_begin(pm4
, PKT3_EVENT_WRITE
);
195 si_pm4_cmd_add(pm4
, EVENT_TYPE(EVENT_TYPE_CACHE_FLUSH
) |
198 si_pm4_cmd_end(pm4
, false);
200 si_pm4_inval_texture_cache(pm4
);
201 si_pm4_inval_shader_cache(pm4
);
202 si_cmd_surface_sync(pm4
, pm4
->cp_coher_cntl
);
204 /* Upload the kernel arguments */
206 /* The extra num_work_size_bytes are for work group / work item size information */
207 kernel_args_size
= program
->input_size
+ num_work_size_bytes
+ 8 /* For scratch va */;
209 kernel_args
= sctx
->b
.ws
->buffer_map(input_buffer
->cs_buf
,
210 sctx
->b
.rings
.gfx
.cs
, PIPE_TRANSFER_WRITE
);
211 for (i
= 0; i
< 3; i
++) {
212 kernel_args
[i
] = grid_layout
[i
];
213 kernel_args
[i
+ 3] = grid_layout
[i
] * block_layout
[i
];
214 kernel_args
[i
+ 6] = block_layout
[i
];
217 num_waves_for_scratch
= compute_num_waves_for_scratch(
218 &sctx
->screen
->b
.info
, block_layout
, grid_layout
);
220 memcpy(kernel_args
+ (num_work_size_bytes
/ 4), input
, program
->input_size
);
222 if (shader
->scratch_bytes_per_wave
> 0) {
223 unsigned scratch_bytes
= shader
->scratch_bytes_per_wave
*
224 num_waves_for_scratch
;
226 COMPUTE_DBG(sctx
->screen
, "Waves: %u; Scratch per wave: %u bytes; "
227 "Total Scratch: %u bytes\n", num_waves_for_scratch
,
228 shader
->scratch_bytes_per_wave
, scratch_bytes
);
229 if (!shader
->scratch_bo
) {
230 shader
->scratch_bo
= (struct r600_resource
*)
231 si_resource_create_custom(sctx
->b
.b
.screen
,
232 PIPE_USAGE_DEFAULT
, scratch_bytes
);
234 scratch_buffer_va
= shader
->scratch_bo
->gpu_address
;
235 si_pm4_add_bo(pm4
, shader
->scratch_bo
,
236 RADEON_USAGE_READWRITE
,
237 RADEON_PRIO_SHADER_RESOURCE_RW
);
241 for (i
= 0; i
< (kernel_args_size
/ 4); i
++) {
242 COMPUTE_DBG(sctx
->screen
, "input %u : %u\n", i
,
246 sctx
->b
.ws
->buffer_unmap(input_buffer
->cs_buf
);
248 kernel_args_va
= input_buffer
->gpu_address
;
249 kernel_args_va
+= kernel_args_offset
;
251 si_pm4_add_bo(pm4
, input_buffer
, RADEON_USAGE_READ
,
252 RADEON_PRIO_SHADER_DATA
);
254 si_pm4_set_reg(pm4
, R_00B900_COMPUTE_USER_DATA_0
, kernel_args_va
);
255 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));
256 si_pm4_set_reg(pm4
, R_00B900_COMPUTE_USER_DATA_0
+ 8, scratch_buffer_va
);
257 si_pm4_set_reg(pm4
, R_00B900_COMPUTE_USER_DATA_0
+ 12,
258 S_008F04_BASE_ADDRESS_HI(scratch_buffer_va
>> 32)
259 | S_008F04_STRIDE(shader
->scratch_bytes_per_wave
/ 64));
261 si_pm4_set_reg(pm4
, R_00B810_COMPUTE_START_X
, 0);
262 si_pm4_set_reg(pm4
, R_00B814_COMPUTE_START_Y
, 0);
263 si_pm4_set_reg(pm4
, R_00B818_COMPUTE_START_Z
, 0);
265 si_pm4_set_reg(pm4
, R_00B81C_COMPUTE_NUM_THREAD_X
,
266 S_00B81C_NUM_THREAD_FULL(block_layout
[0]));
267 si_pm4_set_reg(pm4
, R_00B820_COMPUTE_NUM_THREAD_Y
,
268 S_00B820_NUM_THREAD_FULL(block_layout
[1]));
269 si_pm4_set_reg(pm4
, R_00B824_COMPUTE_NUM_THREAD_Z
,
270 S_00B824_NUM_THREAD_FULL(block_layout
[2]));
273 for (i
= 0; i
< MAX_GLOBAL_BUFFERS
; i
++) {
274 struct r600_resource
*buffer
=
275 (struct r600_resource
*)program
->global_buffers
[i
];
279 si_pm4_add_bo(pm4
, buffer
, RADEON_USAGE_READWRITE
, RADEON_PRIO_SHADER_RESOURCE_RW
);
282 /* This register has been moved to R_00CD20_COMPUTE_MAX_WAVE_ID
283 * and is now per pipe, so it should be handled in the
284 * kernel if we want to use something other than the default value,
285 * which is now 0x22f.
287 if (sctx
->b
.chip_class
<= SI
) {
288 /* XXX: This should be:
289 * (number of compute units) * 4 * (waves per simd) - 1 */
291 si_pm4_set_reg(pm4
, R_00B82C_COMPUTE_MAX_WAVE_ID
,
292 0x190 /* Default value */);
295 shader_va
= shader
->bo
->gpu_address
;
296 si_pm4_add_bo(pm4
, shader
->bo
, RADEON_USAGE_READ
, RADEON_PRIO_SHADER_DATA
);
297 si_pm4_set_reg(pm4
, R_00B830_COMPUTE_PGM_LO
, (shader_va
>> 8) & 0xffffffff);
298 si_pm4_set_reg(pm4
, R_00B834_COMPUTE_PGM_HI
, shader_va
>> 40);
300 si_pm4_set_reg(pm4
, R_00B848_COMPUTE_PGM_RSRC1
,
301 /* We always use at least 3 VGPRS, these come from
303 * XXX: The compiler should account for this.
305 S_00B848_VGPRS((MAX2(3, shader
->num_vgprs
) - 1) / 4)
306 /* We always use at least 4 + arg_user_sgpr_count. The 4 extra
307 * sgprs are from TGID_X_EN, TGID_Y_EN, TGID_Z_EN, TG_SIZE_EN
308 * XXX: The compiler should account for this.
310 | S_00B848_SGPRS(((MAX2(4 + arg_user_sgpr_count
,
311 shader
->num_sgprs
)) - 1) / 8))
314 lds_blocks
= shader
->lds_size
;
315 /* XXX: We are over allocating LDS. For SI, the shader reports LDS in
316 * blocks of 256 bytes, so if there are 4 bytes lds allocated in
317 * the shader and 4 bytes allocated by the state tracker, then
318 * we will set LDS_SIZE to 512 bytes rather than 256.
320 if (sctx
->b
.chip_class
<= SI
) {
321 lds_blocks
+= align(program
->local_size
, 256) >> 8;
323 lds_blocks
+= align(program
->local_size
, 512) >> 9;
326 assert(lds_blocks
<= 0xFF);
328 si_pm4_set_reg(pm4
, R_00B84C_COMPUTE_PGM_RSRC2
,
329 S_00B84C_SCRATCH_EN(shader
->scratch_bytes_per_wave
> 0)
330 | S_00B84C_USER_SGPR(arg_user_sgpr_count
)
331 | S_00B84C_TGID_X_EN(1)
332 | S_00B84C_TGID_Y_EN(1)
333 | S_00B84C_TGID_Z_EN(1)
334 | S_00B84C_TG_SIZE_EN(1)
335 | S_00B84C_TIDIG_COMP_CNT(2)
336 | S_00B84C_LDS_SIZE(lds_blocks
)
337 | S_00B84C_EXCP_EN(0))
339 si_pm4_set_reg(pm4
, R_00B854_COMPUTE_RESOURCE_LIMITS
, 0);
341 si_pm4_set_reg(pm4
, R_00B858_COMPUTE_STATIC_THREAD_MGMT_SE0
,
342 S_00B858_SH0_CU_EN(0xffff /* Default value */)
343 | S_00B858_SH1_CU_EN(0xffff /* Default value */))
346 si_pm4_set_reg(pm4
, R_00B85C_COMPUTE_STATIC_THREAD_MGMT_SE1
,
347 S_00B85C_SH0_CU_EN(0xffff /* Default value */)
348 | S_00B85C_SH1_CU_EN(0xffff /* Default value */))
351 si_pm4_set_reg(pm4
, R_00B860_COMPUTE_TMPRING_SIZE
,
352 /* The maximum value for WAVES is 32 * num CU.
353 * If you program this value incorrectly, the GPU will hang if
354 * COMPUTE_PGM_RSRC2.SCRATCH_EN is enabled.
356 S_00B860_WAVES(num_waves_for_scratch
)
357 | S_00B860_WAVESIZE(shader
->scratch_bytes_per_wave
>> 10))
360 si_pm4_cmd_begin(pm4
, PKT3_DISPATCH_DIRECT
);
361 si_pm4_cmd_add(pm4
, grid_layout
[0]); /* Thread groups DIM_X */
362 si_pm4_cmd_add(pm4
, grid_layout
[1]); /* Thread groups DIM_Y */
363 si_pm4_cmd_add(pm4
, grid_layout
[2]); /* Thread gropus DIM_Z */
364 si_pm4_cmd_add(pm4
, 1); /* DISPATCH_INITIATOR */
365 si_pm4_cmd_end(pm4
, false);
367 si_pm4_cmd_begin(pm4
, PKT3_EVENT_WRITE
);
368 si_pm4_cmd_add(pm4
, EVENT_TYPE(V_028A90_CS_PARTIAL_FLUSH
| EVENT_INDEX(0x4)));
369 si_pm4_cmd_end(pm4
, false);
371 si_pm4_inval_texture_cache(pm4
);
372 si_pm4_inval_shader_cache(pm4
);
373 si_cmd_surface_sync(pm4
, pm4
->cp_coher_cntl
);
375 si_pm4_emit(sctx
, pm4
);
378 fprintf(stderr
, "cdw: %i\n", sctx
->cs
->cdw
);
379 for (i
= 0; i
< sctx
->cs
->cdw
; i
++) {
380 fprintf(stderr
, "%4i : 0x%08X\n", i
, sctx
->cs
->buf
[i
]);
384 si_pm4_free_state(sctx
, pm4
, ~0);
388 static void si_delete_compute_state(struct pipe_context
*ctx
, void* state
){
389 struct si_compute
*program
= (struct si_compute
*)state
;
395 if (program
->kernels
) {
396 for (int i
= 0; i
< program
->num_kernels
; i
++){
397 if (program
->kernels
[i
].bo
){
398 si_shader_destroy(ctx
, &program
->kernels
[i
]);
401 FREE(program
->kernels
);
404 if (program
->llvm_ctx
){
405 LLVMContextDispose(program
->llvm_ctx
);
407 pipe_resource_reference(
408 (struct pipe_resource
**)&program
->input_buffer
, NULL
);
410 //And then free the program itself.
414 static void si_set_compute_resources(struct pipe_context
* ctx_
,
415 unsigned start
, unsigned count
,
416 struct pipe_surface
** surfaces
) { }
418 void si_init_compute_functions(struct si_context
*sctx
)
420 sctx
->b
.b
.create_compute_state
= si_create_compute_state
;
421 sctx
->b
.b
.delete_compute_state
= si_delete_compute_state
;
422 sctx
->b
.b
.bind_compute_state
= si_bind_compute_state
;
423 /* ctx->context.create_sampler_view = evergreen_compute_create_sampler_view; */
424 sctx
->b
.b
.set_compute_resources
= si_set_compute_resources
;
425 sctx
->b
.b
.set_global_binding
= si_set_global_binding
;
426 sctx
->b
.b
.launch_grid
= si_launch_grid
;