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* Copyright 2020 Advanced Micro Devices, Inc.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* on the rights to use, copy, modify, merge, publish, distribute, sub
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* license, and/or sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "si_build_pm4.h"
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#include "ac_shadowed_regs.h"
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#include "util/u_memory.h"
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static void si_build_load_reg(struct si_screen *sscreen, struct si_pm4_state *pm4,
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enum ac_reg_range_type type,
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struct si_resource *shadow_regs)
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uint64_t gpu_address = shadow_regs->gpu_address;
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unsigned packet, num_ranges, offset;
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const struct ac_reg_range *ranges;
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ac_get_reg_ranges(sscreen->info.chip_class, sscreen->info.family,
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type, &num_ranges, &ranges);
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case SI_REG_RANGE_UCONFIG:
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gpu_address += SI_SHADOWED_UCONFIG_REG_OFFSET;
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offset = CIK_UCONFIG_REG_OFFSET;
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packet = PKT3_LOAD_UCONFIG_REG;
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case SI_REG_RANGE_CONTEXT:
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gpu_address += SI_SHADOWED_CONTEXT_REG_OFFSET;
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offset = SI_CONTEXT_REG_OFFSET;
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packet = PKT3_LOAD_CONTEXT_REG;
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gpu_address += SI_SHADOWED_SH_REG_OFFSET;
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offset = SI_SH_REG_OFFSET;
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packet = PKT3_LOAD_SH_REG;
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si_pm4_cmd_add(pm4, PKT3(packet, 1 + num_ranges * 2, 0));
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si_pm4_cmd_add(pm4, gpu_address);
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si_pm4_cmd_add(pm4, gpu_address >> 32);
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for (unsigned i = 0; i < num_ranges; i++) {
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si_pm4_cmd_add(pm4, (ranges[i].offset - offset) / 4);
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si_pm4_cmd_add(pm4, ranges[i].size / 4);
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static struct si_pm4_state *
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si_create_shadowing_ib_preamble(struct si_context *sctx)
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struct si_shadow_preamble {
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struct si_pm4_state pm4;
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uint32_t more_pm4[150]; /* Add more space because the command buffer is large. */
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struct si_pm4_state *pm4 = (struct si_pm4_state *)CALLOC_STRUCT(si_shadow_preamble);
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/* Add all the space that we allocated. */
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pm4->max_dw = sizeof(struct si_shadow_preamble) - offsetof(struct si_shadow_preamble, pm4.pm4);
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if (sctx->screen->dpbb_allowed) {
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si_pm4_cmd_add(pm4, PKT3(PKT3_EVENT_WRITE, 0, 0));
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si_pm4_cmd_add(pm4, EVENT_TYPE(V_028A90_BREAK_BATCH) | EVENT_INDEX(0));
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/* Wait for idle, because we'll update VGT ring pointers. */
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si_pm4_cmd_add(pm4, PKT3(PKT3_EVENT_WRITE, 0, 0));
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si_pm4_cmd_add(pm4, EVENT_TYPE(V_028A90_VS_PARTIAL_FLUSH) | EVENT_INDEX(4));
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/* VGT_FLUSH is required even if VGT is idle. It resets VGT pointers. */
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si_pm4_cmd_add(pm4, PKT3(PKT3_EVENT_WRITE, 0, 0));
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si_pm4_cmd_add(pm4, EVENT_TYPE(V_028A90_VGT_FLUSH) | EVENT_INDEX(0));
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if (sctx->chip_class >= GFX10) {
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unsigned gcr_cntl = S_586_GL2_INV(1) | S_586_GL2_WB(1) |
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S_586_GLM_INV(1) | S_586_GLM_WB(1) |
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S_586_GL1_INV(1) | S_586_GLV_INV(1) |
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S_586_GLK_INV(1) | S_586_GLI_INV(V_586_GLI_ALL);
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si_pm4_cmd_add(pm4, PKT3(PKT3_ACQUIRE_MEM, 6, 0));
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si_pm4_cmd_add(pm4, 0); /* CP_COHER_CNTL */
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si_pm4_cmd_add(pm4, 0xffffffff); /* CP_COHER_SIZE */
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si_pm4_cmd_add(pm4, 0xffffff); /* CP_COHER_SIZE_HI */
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si_pm4_cmd_add(pm4, 0); /* CP_COHER_BASE */
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si_pm4_cmd_add(pm4, 0); /* CP_COHER_BASE_HI */
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si_pm4_cmd_add(pm4, 0x0000000A); /* POLL_INTERVAL */
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si_pm4_cmd_add(pm4, gcr_cntl); /* GCR_CNTL */
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} else if (sctx->chip_class == GFX9) {
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unsigned cp_coher_cntl = S_0301F0_SH_ICACHE_ACTION_ENA(1) |
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S_0301F0_SH_KCACHE_ACTION_ENA(1) |
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S_0301F0_TC_ACTION_ENA(1) |
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S_0301F0_TCL1_ACTION_ENA(1) |
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S_0301F0_TC_WB_ACTION_ENA(1);
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si_pm4_cmd_add(pm4, PKT3(PKT3_ACQUIRE_MEM, 5, 0));
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si_pm4_cmd_add(pm4, cp_coher_cntl); /* CP_COHER_CNTL */
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si_pm4_cmd_add(pm4, 0xffffffff); /* CP_COHER_SIZE */
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si_pm4_cmd_add(pm4, 0xffffff); /* CP_COHER_SIZE_HI */
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si_pm4_cmd_add(pm4, 0); /* CP_COHER_BASE */
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si_pm4_cmd_add(pm4, 0); /* CP_COHER_BASE_HI */
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si_pm4_cmd_add(pm4, 0x0000000A); /* POLL_INTERVAL */
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unreachable("invalid chip");
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si_pm4_cmd_add(pm4, PKT3(PKT3_PFP_SYNC_ME, 0, 0));
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si_pm4_cmd_add(pm4, 0);
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si_pm4_cmd_add(pm4, PKT3(PKT3_CONTEXT_CONTROL, 1, 0));
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CC0_UPDATE_LOAD_ENABLES(1) |
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CC0_LOAD_PER_CONTEXT_STATE(1) |
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CC0_LOAD_CS_SH_REGS(1) |
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CC0_LOAD_GFX_SH_REGS(1) |
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CC0_LOAD_GLOBAL_UCONFIG(1));
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CC1_UPDATE_SHADOW_ENABLES(1) |
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CC1_SHADOW_PER_CONTEXT_STATE(1) |
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CC1_SHADOW_CS_SH_REGS(1) |
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CC1_SHADOW_GFX_SH_REGS(1) |
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CC1_SHADOW_GLOBAL_UCONFIG(1));
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for (unsigned i = 0; i < SI_NUM_SHADOWED_REG_RANGES; i++)
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si_build_load_reg(sctx->screen, pm4, i, sctx->shadowed_regs);
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static void si_set_context_reg_array(struct radeon_cmdbuf *cs, unsigned reg, unsigned num,
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const uint32_t *values)
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radeon_set_context_reg_seq(reg, num);
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radeon_emit_array(values, num);
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void si_init_cp_reg_shadowing(struct si_context *sctx)
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if (sctx->screen->info.mid_command_buffer_preemption_enabled ||
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sctx->screen->debug_flags & DBG(SHADOW_REGS)) {
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sctx->shadowed_regs =
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si_aligned_buffer_create(sctx->b.screen,
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PIPE_RESOURCE_FLAG_UNMAPPABLE | SI_RESOURCE_FLAG_DRIVER_INTERNAL,
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SI_SHADOWED_REG_BUFFER_SIZE,
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if (!sctx->shadowed_regs)
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fprintf(stderr, "radeonsi: cannot create a shadowed_regs buffer\n");
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si_init_cs_preamble_state(sctx, sctx->shadowed_regs != NULL);
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if (sctx->shadowed_regs) {
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/* We need to clear the shadowed reg buffer. */
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si_cp_dma_clear_buffer(sctx, &sctx->gfx_cs, &sctx->shadowed_regs->b.b,
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0, sctx->shadowed_regs->bo_size, 0, SI_OP_SYNC_AFTER,
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SI_COHERENCY_CP, L2_BYPASS);
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/* Create the shadowing preamble. */
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struct si_pm4_state *shadowing_preamble =
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si_create_shadowing_ib_preamble(sctx);
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/* Initialize shadowed registers as follows. */
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radeon_add_to_buffer_list(sctx, &sctx->gfx_cs, sctx->shadowed_regs,
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RADEON_USAGE_READWRITE | RADEON_PRIO_DESCRIPTORS);
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si_pm4_emit(sctx, shadowing_preamble);
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ac_emulate_clear_state(&sctx->screen->info, &sctx->gfx_cs, si_set_context_reg_array);
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si_pm4_emit(sctx, sctx->cs_preamble_state);
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/* The register values are shadowed, so we won't need to set them again. */
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si_pm4_free_state(sctx, sctx->cs_preamble_state, ~0);
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sctx->cs_preamble_state = NULL;
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si_set_tracked_regs_to_clear_state(sctx);
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/* Setup preemption. The shadowing preamble will be executed as a preamble IB,
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* which will load register values from memory on a context switch.
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sctx->ws->cs_setup_preemption(&sctx->gfx_cs, shadowing_preamble->pm4,
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shadowing_preamble->ndw);
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si_pm4_free_state(sctx, shadowing_preamble, ~0);