src/gallium/drivers/radeonsi/si_compute.c - platform/external/mesa3d - Gitiles

 /*
  * 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], mod);
 			LLVMDisposeModule(mod);
 		}
 	}
 #else

 	radeon_elf_read(code, header->num_bytes, &program->shader.binary, true);

 	/* 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, &program->shader.binary);

 #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]);
 	}

 	sctx->b.ws->buffer_unmap(input_buffer->cs_buf);

 	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;
 }
	/*
	* 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], mod);
	LLVMDisposeModule(mod);
	}
	}
	#else

	radeon_elf_read(code, header->num_bytes, &program->shader.binary, true);

	/* 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, &program->shader.binary);

	#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]);
	}

	sctx->b.ws->buffer_unmap(input_buffer->cs_buf);

	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;
	}