/* * Copyright 2013 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * on the rights to use, copy, modify, merge, publish, distribute, sub * license, and/or sell copies of the Software, and to permit persons to whom * the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #include "util/u_memory.h" #include "radeon/r600_pipe_common.h" #include "radeon/radeon_elf_util.h" #include "radeon/radeon_llvm_util.h" #include "radeon/r600_cs.h" #include "si_pipe.h" #include "si_shader.h" #include "sid.h" #define MAX_GLOBAL_BUFFERS 20 #if HAVE_LLVM < 0x0305 #define NUM_USER_SGPRS 2 #else /* XXX: Even though we don't pass the scratch buffer via user sgprs any more * LLVM still expects that we specify 4 USER_SGPRS so it can remain compatible * with older mesa. */ #define NUM_USER_SGPRS 4 #endif struct si_compute { struct si_context *ctx; unsigned local_size; unsigned private_size; unsigned input_size; struct si_shader shader; unsigned num_user_sgprs; struct r600_resource *input_buffer; struct pipe_resource *global_buffers[MAX_GLOBAL_BUFFERS]; #if HAVE_LLVM < 0x0306 unsigned num_kernels; struct si_shader *kernels; LLVMContextRef llvm_ctx; #endif }; static void init_scratch_buffer(struct si_context *sctx, struct si_compute *program) { unsigned scratch_bytes = 0; uint64_t scratch_buffer_va; unsigned i; /* Compute the scratch buffer size using the maximum number of waves. * This way we don't need to recompute it for each kernel launch. */ unsigned scratch_waves = 32 * sctx->screen->b.info.max_compute_units; for (i = 0; i < program->shader.binary.global_symbol_count; i++) { unsigned offset = program->shader.binary.global_symbol_offsets[i]; unsigned scratch_bytes_needed; si_shader_binary_read_config(sctx->screen, &program->shader, offset); scratch_bytes_needed = program->shader.scratch_bytes_per_wave; scratch_bytes = MAX2(scratch_bytes, scratch_bytes_needed); } if (scratch_bytes == 0) return; program->shader.scratch_bo = (struct r600_resource*) si_resource_create_custom(sctx->b.b.screen, PIPE_USAGE_DEFAULT, scratch_bytes * scratch_waves); scratch_buffer_va = program->shader.scratch_bo->gpu_address; /* apply_scratch_relocs needs scratch_bytes_per_wave to be set * to the maximum bytes needed, so it can compute the stride * correctly. */ program->shader.scratch_bytes_per_wave = scratch_bytes; /* Patch the shader with the scratch buffer address. */ si_shader_apply_scratch_relocs(sctx, &program->shader, scratch_buffer_va); } static void *si_create_compute_state( struct pipe_context *ctx, const struct pipe_compute_state *cso) { struct si_context *sctx = (struct si_context *)ctx; struct si_compute *program = CALLOC_STRUCT(si_compute); const struct pipe_llvm_program_header *header; const char *code; header = cso->prog; code = cso->prog + sizeof(struct pipe_llvm_program_header); program->ctx = sctx; program->local_size = cso->req_local_mem; program->private_size = cso->req_private_mem; program->input_size = cso->req_input_mem; #if HAVE_LLVM < 0x0306 { unsigned i; program->llvm_ctx = LLVMContextCreate(); program->num_kernels = radeon_llvm_get_num_kernels(program->llvm_ctx, code, header->num_bytes); program->kernels = CALLOC(sizeof(struct si_shader), program->num_kernels); for (i = 0; i < program->num_kernels; i++) { LLVMModuleRef mod = radeon_llvm_get_kernel_module(program->llvm_ctx, i, code, header->num_bytes); si_compile_llvm(sctx->screen, &program->kernels[i], sctx->tm, mod); LLVMDisposeModule(mod); } } #else radeon_elf_read(code, header->num_bytes, &program->shader.binary); /* init_scratch_buffer patches the shader code with the scratch address, * so we need to call it before si_shader_binary_read() which uploads * the shader code to the GPU. */ init_scratch_buffer(sctx, program); si_shader_binary_read(sctx->screen, &program->shader); #endif program->input_buffer = si_resource_create_custom(sctx->b.b.screen, PIPE_USAGE_IMMUTABLE, program->input_size); return program; } static void si_bind_compute_state(struct pipe_context *ctx, void *state) { struct si_context *sctx = (struct si_context*)ctx; sctx->cs_shader_state.program = (struct si_compute*)state; } static void si_set_global_binding( struct pipe_context *ctx, unsigned first, unsigned n, struct pipe_resource **resources, uint32_t **handles) { unsigned i; struct si_context *sctx = (struct si_context*)ctx; struct si_compute *program = sctx->cs_shader_state.program; if (!resources) { for (i = first; i < first + n; i++) { pipe_resource_reference(&program->global_buffers[i], NULL); } return; } for (i = first; i < first + n; i++) { uint64_t va; uint32_t offset; pipe_resource_reference(&program->global_buffers[i], resources[i]); va = r600_resource(resources[i])->gpu_address; offset = util_le32_to_cpu(*handles[i]); va += offset; va = util_cpu_to_le64(va); memcpy(handles[i], &va, sizeof(va)); } } /** * This function computes the value for R_00B860_COMPUTE_TMPRING_SIZE.WAVES * /p block_layout is the number of threads in each work group. * /p grid layout is the number of work groups. */ static unsigned compute_num_waves_for_scratch( const struct radeon_info *info, const uint *block_layout, const uint *grid_layout) { unsigned num_sh = MAX2(info->max_sh_per_se, 1); unsigned num_se = MAX2(info->max_se, 1); unsigned num_blocks = 1; unsigned threads_per_block = 1; unsigned waves_per_block; unsigned waves_per_sh; unsigned waves; unsigned scratch_waves; unsigned i; for (i = 0; i < 3; i++) { threads_per_block *= block_layout[i]; num_blocks *= grid_layout[i]; } waves_per_block = align(threads_per_block, 64) / 64; waves = waves_per_block * num_blocks; waves_per_sh = align(waves, num_sh * num_se) / (num_sh * num_se); scratch_waves = waves_per_sh * num_sh * num_se; if (waves_per_block > waves_per_sh) { scratch_waves = waves_per_block * num_sh * num_se; } return scratch_waves; } static void si_launch_grid( struct pipe_context *ctx, const uint *block_layout, const uint *grid_layout, uint32_t pc, const void *input) { struct si_context *sctx = (struct si_context*)ctx; struct radeon_winsys_cs *cs = sctx->b.rings.gfx.cs; struct si_compute *program = sctx->cs_shader_state.program; struct si_pm4_state *pm4 = CALLOC_STRUCT(si_pm4_state); struct r600_resource *input_buffer = program->input_buffer; unsigned kernel_args_size; unsigned num_work_size_bytes = 36; uint32_t kernel_args_offset = 0; uint32_t *kernel_args; uint64_t kernel_args_va; uint64_t scratch_buffer_va = 0; uint64_t shader_va; unsigned arg_user_sgpr_count = NUM_USER_SGPRS; unsigned i; struct si_shader *shader = &program->shader; unsigned lds_blocks; unsigned num_waves_for_scratch; #if HAVE_LLVM < 0x0306 shader = &program->kernels[pc]; #endif radeon_emit(cs, PKT3(PKT3_CONTEXT_CONTROL, 1, 0) | PKT3_SHADER_TYPE_S(1)); radeon_emit(cs, 0x80000000); radeon_emit(cs, 0x80000000); sctx->b.flags |= SI_CONTEXT_INV_TC_L1 | SI_CONTEXT_INV_TC_L2 | SI_CONTEXT_INV_ICACHE | SI_CONTEXT_INV_KCACHE | SI_CONTEXT_FLUSH_WITH_INV_L2 | SI_CONTEXT_FLAG_COMPUTE; si_emit_cache_flush(&sctx->b, NULL); pm4->compute_pkt = true; #if HAVE_LLVM >= 0x0306 /* Read the config information */ si_shader_binary_read_config(sctx->screen, shader, pc); #endif /* Upload the kernel arguments */ /* The extra num_work_size_bytes are for work group / work item size information */ kernel_args_size = program->input_size + num_work_size_bytes + 8 /* For scratch va */; kernel_args = sctx->b.ws->buffer_map(input_buffer->cs_buf, sctx->b.rings.gfx.cs, PIPE_TRANSFER_WRITE); for (i = 0; i < 3; i++) { kernel_args[i] = grid_layout[i]; kernel_args[i + 3] = grid_layout[i] * block_layout[i]; kernel_args[i + 6] = block_layout[i]; } num_waves_for_scratch = compute_num_waves_for_scratch( &sctx->screen->b.info, block_layout, grid_layout); memcpy(kernel_args + (num_work_size_bytes / 4), input, program->input_size); if (shader->scratch_bytes_per_wave > 0) { COMPUTE_DBG(sctx->screen, "Waves: %u; Scratch per wave: %u bytes; " "Total Scratch: %u bytes\n", num_waves_for_scratch, shader->scratch_bytes_per_wave, shader->scratch_bytes_per_wave * num_waves_for_scratch); si_pm4_add_bo(pm4, shader->scratch_bo, RADEON_USAGE_READWRITE, RADEON_PRIO_SHADER_RESOURCE_RW); scratch_buffer_va = shader->scratch_bo->gpu_address; } for (i = 0; i < (kernel_args_size / 4); i++) { COMPUTE_DBG(sctx->screen, "input %u : %u\n", i, kernel_args[i]); } kernel_args_va = input_buffer->gpu_address; kernel_args_va += kernel_args_offset; si_pm4_add_bo(pm4, input_buffer, RADEON_USAGE_READ, RADEON_PRIO_SHADER_DATA); si_pm4_set_reg(pm4, R_00B900_COMPUTE_USER_DATA_0, kernel_args_va); 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)); si_pm4_set_reg(pm4, R_00B900_COMPUTE_USER_DATA_0 + 8, scratch_buffer_va); si_pm4_set_reg(pm4, R_00B900_COMPUTE_USER_DATA_0 + 12, S_008F04_BASE_ADDRESS_HI(scratch_buffer_va >> 32) | S_008F04_STRIDE(shader->scratch_bytes_per_wave / 64)); si_pm4_set_reg(pm4, R_00B810_COMPUTE_START_X, 0); si_pm4_set_reg(pm4, R_00B814_COMPUTE_START_Y, 0); si_pm4_set_reg(pm4, R_00B818_COMPUTE_START_Z, 0); si_pm4_set_reg(pm4, R_00B81C_COMPUTE_NUM_THREAD_X, S_00B81C_NUM_THREAD_FULL(block_layout[0])); si_pm4_set_reg(pm4, R_00B820_COMPUTE_NUM_THREAD_Y, S_00B820_NUM_THREAD_FULL(block_layout[1])); si_pm4_set_reg(pm4, R_00B824_COMPUTE_NUM_THREAD_Z, S_00B824_NUM_THREAD_FULL(block_layout[2])); /* Global buffers */ for (i = 0; i < MAX_GLOBAL_BUFFERS; i++) { struct r600_resource *buffer = (struct r600_resource*)program->global_buffers[i]; if (!buffer) { continue; } si_pm4_add_bo(pm4, buffer, RADEON_USAGE_READWRITE, RADEON_PRIO_SHADER_RESOURCE_RW); } /* This register has been moved to R_00CD20_COMPUTE_MAX_WAVE_ID * and is now per pipe, so it should be handled in the * kernel if we want to use something other than the default value, * which is now 0x22f. */ if (sctx->b.chip_class <= SI) { /* XXX: This should be: * (number of compute units) * 4 * (waves per simd) - 1 */ si_pm4_set_reg(pm4, R_00B82C_COMPUTE_MAX_WAVE_ID, 0x190 /* Default value */); } shader_va = shader->bo->gpu_address; #if HAVE_LLVM >= 0x0306 shader_va += pc; #endif si_pm4_add_bo(pm4, shader->bo, RADEON_USAGE_READ, RADEON_PRIO_SHADER_DATA); si_pm4_set_reg(pm4, R_00B830_COMPUTE_PGM_LO, (shader_va >> 8) & 0xffffffff); si_pm4_set_reg(pm4, R_00B834_COMPUTE_PGM_HI, shader_va >> 40); si_pm4_set_reg(pm4, R_00B848_COMPUTE_PGM_RSRC1, /* We always use at least 3 VGPRS, these come from * TIDIG_COMP_CNT. * XXX: The compiler should account for this. */ S_00B848_VGPRS((MAX2(3, shader->num_vgprs) - 1) / 4) /* We always use at least 4 + arg_user_sgpr_count. The 4 extra * sgprs are from TGID_X_EN, TGID_Y_EN, TGID_Z_EN, TG_SIZE_EN * XXX: The compiler should account for this. */ | S_00B848_SGPRS(((MAX2(4 + arg_user_sgpr_count, shader->num_sgprs)) - 1) / 8) | S_00B028_FLOAT_MODE(shader->float_mode)) ; lds_blocks = shader->lds_size; /* XXX: We are over allocating LDS. For SI, the shader reports LDS in * blocks of 256 bytes, so if there are 4 bytes lds allocated in * the shader and 4 bytes allocated by the state tracker, then * we will set LDS_SIZE to 512 bytes rather than 256. */ if (sctx->b.chip_class <= SI) { lds_blocks += align(program->local_size, 256) >> 8; } else { lds_blocks += align(program->local_size, 512) >> 9; } assert(lds_blocks <= 0xFF); si_pm4_set_reg(pm4, R_00B84C_COMPUTE_PGM_RSRC2, S_00B84C_SCRATCH_EN(shader->scratch_bytes_per_wave > 0) | S_00B84C_USER_SGPR(arg_user_sgpr_count) | S_00B84C_TGID_X_EN(1) | S_00B84C_TGID_Y_EN(1) | S_00B84C_TGID_Z_EN(1) | S_00B84C_TG_SIZE_EN(1) | S_00B84C_TIDIG_COMP_CNT(2) | S_00B84C_LDS_SIZE(lds_blocks) | S_00B84C_EXCP_EN(0)) ; si_pm4_set_reg(pm4, R_00B854_COMPUTE_RESOURCE_LIMITS, 0); si_pm4_set_reg(pm4, R_00B858_COMPUTE_STATIC_THREAD_MGMT_SE0, S_00B858_SH0_CU_EN(0xffff /* Default value */) | S_00B858_SH1_CU_EN(0xffff /* Default value */)) ; si_pm4_set_reg(pm4, R_00B85C_COMPUTE_STATIC_THREAD_MGMT_SE1, S_00B85C_SH0_CU_EN(0xffff /* Default value */) | S_00B85C_SH1_CU_EN(0xffff /* Default value */)) ; num_waves_for_scratch = MIN2(num_waves_for_scratch, 32 * sctx->screen->b.info.max_compute_units); si_pm4_set_reg(pm4, R_00B860_COMPUTE_TMPRING_SIZE, /* The maximum value for WAVES is 32 * num CU. * If you program this value incorrectly, the GPU will hang if * COMPUTE_PGM_RSRC2.SCRATCH_EN is enabled. */ S_00B860_WAVES(num_waves_for_scratch) | S_00B860_WAVESIZE(shader->scratch_bytes_per_wave >> 10)) ; si_pm4_cmd_begin(pm4, PKT3_DISPATCH_DIRECT); si_pm4_cmd_add(pm4, grid_layout[0]); /* Thread groups DIM_X */ si_pm4_cmd_add(pm4, grid_layout[1]); /* Thread groups DIM_Y */ si_pm4_cmd_add(pm4, grid_layout[2]); /* Thread gropus DIM_Z */ si_pm4_cmd_add(pm4, 1); /* DISPATCH_INITIATOR */ si_pm4_cmd_end(pm4, false); si_pm4_emit(sctx, pm4); #if 0 fprintf(stderr, "cdw: %i\n", sctx->cs->cdw); for (i = 0; i < sctx->cs->cdw; i++) { fprintf(stderr, "%4i : 0x%08X\n", i, sctx->cs->buf[i]); } #endif si_pm4_free_state(sctx, pm4, ~0); sctx->b.flags |= SI_CONTEXT_CS_PARTIAL_FLUSH | SI_CONTEXT_INV_TC_L1 | SI_CONTEXT_INV_TC_L2 | SI_CONTEXT_INV_ICACHE | SI_CONTEXT_INV_KCACHE | SI_CONTEXT_FLAG_COMPUTE; si_emit_cache_flush(&sctx->b, NULL); } static void si_delete_compute_state(struct pipe_context *ctx, void* state){ struct si_compute *program = (struct si_compute *)state; if (!state) { return; } #if HAVE_LLVM < 0x0306 if (program->kernels) { for (int i = 0; i < program->num_kernels; i++){ if (program->kernels[i].bo){ si_shader_destroy(ctx, &program->kernels[i]); } } FREE(program->kernels); } if (program->llvm_ctx){ LLVMContextDispose(program->llvm_ctx); } #else FREE(program->shader.binary.config); FREE(program->shader.binary.rodata); FREE(program->shader.binary.global_symbol_offsets); si_shader_destroy(ctx, &program->shader); #endif pipe_resource_reference( (struct pipe_resource **)&program->input_buffer, NULL); FREE(program); } static void si_set_compute_resources(struct pipe_context * ctx_, unsigned start, unsigned count, struct pipe_surface ** surfaces) { } void si_init_compute_functions(struct si_context *sctx) { sctx->b.b.create_compute_state = si_create_compute_state; sctx->b.b.delete_compute_state = si_delete_compute_state; sctx->b.b.bind_compute_state = si_bind_compute_state; /* ctx->context.create_sampler_view = evergreen_compute_create_sampler_view; */ sctx->b.b.set_compute_resources = si_set_compute_resources; sctx->b.b.set_global_binding = si_set_global_binding; sctx->b.b.launch_grid = si_launch_grid; }