1048 lines
34 KiB
C
1048 lines
34 KiB
C
/*
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* Copyright © 2017 Intel Corporation
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*
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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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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* @file crocus_batch.c
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*
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* Batchbuffer and command submission module.
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*
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* Every API draw call results in a number of GPU commands, which we
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* collect into a "batch buffer". Typically, many draw calls are grouped
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* into a single batch to amortize command submission overhead.
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*
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* We submit batches to the kernel using the I915_GEM_EXECBUFFER2 ioctl.
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* One critical piece of data is the "validation list", which contains a
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* list of the buffer objects (BOs) which the commands in the GPU need.
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* The kernel will make sure these are resident and pinned at the correct
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* virtual memory address before executing our batch. If a BO is not in
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* the validation list, it effectively does not exist, so take care.
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*/
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#include "crocus_batch.h"
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#include "crocus_bufmgr.h"
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#include "crocus_context.h"
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#include "crocus_fence.h"
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#include "drm-uapi/i915_drm.h"
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#include "intel/common/intel_gem.h"
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#include "main/macros.h"
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#include "util/hash_table.h"
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#include "util/set.h"
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#include "util/u_upload_mgr.h"
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#include <errno.h>
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#include <xf86drm.h>
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#if HAVE_VALGRIND
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#include <memcheck.h>
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#include <valgrind.h>
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#define VG(x) x
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#else
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#define VG(x)
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#endif
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#define FILE_DEBUG_FLAG DEBUG_BUFMGR
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/* Terminating the batch takes either 4 bytes for MI_BATCH_BUFFER_END
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* or 12 bytes for MI_BATCH_BUFFER_START (when chaining). Plus, we may
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* need an extra 4 bytes to pad out to the nearest QWord. So reserve 16.
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*/
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#define BATCH_RESERVED(devinfo) ((devinfo)->is_haswell ? 32 : 16)
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static void crocus_batch_reset(struct crocus_batch *batch);
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static unsigned
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num_fences(struct crocus_batch *batch)
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{
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return util_dynarray_num_elements(&batch->exec_fences,
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struct drm_i915_gem_exec_fence);
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}
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/**
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* Debugging code to dump the fence list, used by INTEL_DEBUG=submit.
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*/
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static void
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dump_fence_list(struct crocus_batch *batch)
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{
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fprintf(stderr, "Fence list (length %u): ", num_fences(batch));
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util_dynarray_foreach(&batch->exec_fences,
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struct drm_i915_gem_exec_fence, f) {
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fprintf(stderr, "%s%u%s ",
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(f->flags & I915_EXEC_FENCE_WAIT) ? "..." : "",
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f->handle,
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(f->flags & I915_EXEC_FENCE_SIGNAL) ? "!" : "");
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}
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fprintf(stderr, "\n");
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}
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/**
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* Debugging code to dump the validation list, used by INTEL_DEBUG=submit.
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*/
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static void
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dump_validation_list(struct crocus_batch *batch)
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{
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fprintf(stderr, "Validation list (length %d):\n", batch->exec_count);
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for (int i = 0; i < batch->exec_count; i++) {
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uint64_t flags = batch->validation_list[i].flags;
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assert(batch->validation_list[i].handle ==
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batch->exec_bos[i]->gem_handle);
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fprintf(stderr,
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"[%2d]: %2d %-14s @ 0x%016llx (%" PRIu64 "B)\t %2d refs %s\n", i,
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batch->validation_list[i].handle, batch->exec_bos[i]->name,
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batch->validation_list[i].offset, batch->exec_bos[i]->size,
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batch->exec_bos[i]->refcount,
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(flags & EXEC_OBJECT_WRITE) ? " (write)" : "");
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}
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}
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/**
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* Return BO information to the batch decoder (for debugging).
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*/
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static struct intel_batch_decode_bo
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decode_get_bo(void *v_batch, bool ppgtt, uint64_t address)
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{
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struct crocus_batch *batch = v_batch;
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for (int i = 0; i < batch->exec_count; i++) {
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struct crocus_bo *bo = batch->exec_bos[i];
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/* The decoder zeroes out the top 16 bits, so we need to as well */
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uint64_t bo_address = bo->gtt_offset & (~0ull >> 16);
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if (address >= bo_address && address < bo_address + bo->size) {
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return (struct intel_batch_decode_bo){
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.addr = address,
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.size = bo->size,
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.map = crocus_bo_map(batch->dbg, bo, MAP_READ) +
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(address - bo_address),
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};
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}
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}
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return (struct intel_batch_decode_bo) { };
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}
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static unsigned
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decode_get_state_size(void *v_batch, uint64_t address,
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uint64_t base_address)
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{
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struct crocus_batch *batch = v_batch;
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/* The decoder gives us offsets from a base address, which is not great.
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* Binding tables are relative to surface state base address, and other
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* state is relative to dynamic state base address. These could alias,
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* but in practice it's unlikely because surface offsets are always in
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* the [0, 64K) range, and we assign dynamic state addresses starting at
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* the top of the 4GB range. We should fix this but it's likely good
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* enough for now.
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*/
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unsigned size = (uintptr_t)
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_mesa_hash_table_u64_search(batch->state_sizes, address - base_address);
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return size;
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}
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/**
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* Decode the current batch.
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*/
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static void
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decode_batch(struct crocus_batch *batch)
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{
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void *map = crocus_bo_map(batch->dbg, batch->exec_bos[0], MAP_READ);
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intel_print_batch(&batch->decoder, map, batch->primary_batch_size,
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batch->exec_bos[0]->gtt_offset, false);
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}
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static void
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init_reloc_list(struct crocus_reloc_list *rlist, int count)
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{
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rlist->reloc_count = 0;
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rlist->reloc_array_size = count;
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rlist->relocs = malloc(rlist->reloc_array_size *
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sizeof(struct drm_i915_gem_relocation_entry));
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}
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void
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crocus_init_batch(struct crocus_context *ice,
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enum crocus_batch_name name,
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int priority)
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{
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struct crocus_batch *batch = &ice->batches[name];
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struct crocus_screen *screen = (struct crocus_screen *)ice->ctx.screen;
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struct intel_device_info *devinfo = &screen->devinfo;
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batch->ice = ice;
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batch->screen = screen;
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batch->dbg = &ice->dbg;
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batch->reset = &ice->reset;
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batch->name = name;
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batch->contains_fence_signal = false;
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if (devinfo->ver >= 7) {
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batch->fine_fences.uploader =
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u_upload_create(&ice->ctx, 4096, PIPE_BIND_CUSTOM,
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PIPE_USAGE_STAGING, 0);
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}
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crocus_fine_fence_init(batch);
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batch->hw_ctx_id = crocus_create_hw_context(screen->bufmgr);
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assert(batch->hw_ctx_id);
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crocus_hw_context_set_priority(screen->bufmgr, batch->hw_ctx_id, priority);
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batch->valid_reloc_flags = EXEC_OBJECT_WRITE;
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if (devinfo->ver == 6)
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batch->valid_reloc_flags |= EXEC_OBJECT_NEEDS_GTT;
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if (INTEL_DEBUG & DEBUG_BATCH) {
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/* The shadow doesn't get relocs written so state decode fails. */
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batch->use_shadow_copy = false;
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} else
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batch->use_shadow_copy = !devinfo->has_llc;
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util_dynarray_init(&batch->exec_fences, ralloc_context(NULL));
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util_dynarray_init(&batch->syncobjs, ralloc_context(NULL));
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init_reloc_list(&batch->command.relocs, 250);
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init_reloc_list(&batch->state.relocs, 250);
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batch->exec_count = 0;
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batch->exec_array_size = 100;
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batch->exec_bos =
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malloc(batch->exec_array_size * sizeof(batch->exec_bos[0]));
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batch->validation_list =
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malloc(batch->exec_array_size * sizeof(batch->validation_list[0]));
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batch->cache.render = _mesa_hash_table_create(NULL, NULL,
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_mesa_key_pointer_equal);
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batch->cache.depth = _mesa_set_create(NULL, NULL,
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_mesa_key_pointer_equal);
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memset(batch->other_batches, 0, sizeof(batch->other_batches));
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for (int i = 0, j = 0; i < ice->batch_count; i++) {
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if (i != name)
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batch->other_batches[j++] = &ice->batches[i];
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}
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if (INTEL_DEBUG & DEBUG_BATCH) {
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batch->state_sizes = _mesa_hash_table_u64_create(NULL);
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const unsigned decode_flags =
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INTEL_BATCH_DECODE_FULL |
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((INTEL_DEBUG & DEBUG_COLOR) ? INTEL_BATCH_DECODE_IN_COLOR : 0) |
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INTEL_BATCH_DECODE_OFFSETS | INTEL_BATCH_DECODE_FLOATS;
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intel_batch_decode_ctx_init(&batch->decoder, &screen->devinfo, stderr,
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decode_flags, NULL, decode_get_bo,
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decode_get_state_size, batch);
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batch->decoder.max_vbo_decoded_lines = 32;
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}
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crocus_batch_reset(batch);
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}
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static struct drm_i915_gem_exec_object2 *
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find_validation_entry(struct crocus_batch *batch, struct crocus_bo *bo)
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{
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unsigned index = READ_ONCE(bo->index);
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if (index < batch->exec_count && batch->exec_bos[index] == bo)
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return &batch->validation_list[index];
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/* May have been shared between multiple active batches */
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for (index = 0; index < batch->exec_count; index++) {
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if (batch->exec_bos[index] == bo)
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return &batch->validation_list[index];
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}
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return NULL;
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}
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static void
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ensure_exec_obj_space(struct crocus_batch *batch, uint32_t count)
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{
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while (batch->exec_count + count > batch->exec_array_size) {
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batch->exec_array_size *= 2;
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batch->exec_bos = realloc(
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batch->exec_bos, batch->exec_array_size * sizeof(batch->exec_bos[0]));
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batch->validation_list =
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realloc(batch->validation_list,
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batch->exec_array_size * sizeof(batch->validation_list[0]));
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}
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}
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static struct drm_i915_gem_exec_object2 *
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crocus_use_bo(struct crocus_batch *batch, struct crocus_bo *bo, bool writable)
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{
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assert(bo->bufmgr == batch->command.bo->bufmgr);
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if (bo == batch->ice->workaround_bo)
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writable = false;
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struct drm_i915_gem_exec_object2 *existing_entry =
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find_validation_entry(batch, bo);
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if (existing_entry) {
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/* The BO is already in the validation list; mark it writable */
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if (writable)
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existing_entry->flags |= EXEC_OBJECT_WRITE;
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return existing_entry;
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}
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if (bo != batch->command.bo && bo != batch->state.bo) {
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/* This is the first time our batch has seen this BO. Before we use it,
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* we may need to flush and synchronize with other batches.
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*/
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for (int b = 0; b < ARRAY_SIZE(batch->other_batches); b++) {
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if (!batch->other_batches[b])
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continue;
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struct drm_i915_gem_exec_object2 *other_entry =
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find_validation_entry(batch->other_batches[b], bo);
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/* If the buffer is referenced by another batch, and either batch
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* intends to write it, then flush the other batch and synchronize.
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*
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* Consider these cases:
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*
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* 1. They read, we read => No synchronization required.
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* 2. They read, we write => Synchronize (they need the old value)
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* 3. They write, we read => Synchronize (we need their new value)
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* 4. They write, we write => Synchronize (order writes)
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*
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* The read/read case is very common, as multiple batches usually
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* share a streaming state buffer or shader assembly buffer, and
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* we want to avoid synchronizing in this case.
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*/
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if (other_entry &&
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((other_entry->flags & EXEC_OBJECT_WRITE) || writable)) {
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crocus_batch_flush(batch->other_batches[b]);
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crocus_batch_add_syncobj(batch,
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batch->other_batches[b]->last_fence->syncobj,
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I915_EXEC_FENCE_WAIT);
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}
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}
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}
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/* Bump the ref count since the batch is now using this bo. */
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crocus_bo_reference(bo);
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ensure_exec_obj_space(batch, 1);
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batch->validation_list[batch->exec_count] =
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(struct drm_i915_gem_exec_object2) {
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.handle = bo->gem_handle,
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.offset = bo->gtt_offset,
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.flags = bo->kflags | (writable ? EXEC_OBJECT_WRITE : 0),
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};
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bo->index = batch->exec_count;
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batch->exec_bos[batch->exec_count] = bo;
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batch->aperture_space += bo->size;
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batch->exec_count++;
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return &batch->validation_list[batch->exec_count - 1];
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}
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static uint64_t
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emit_reloc(struct crocus_batch *batch,
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struct crocus_reloc_list *rlist, uint32_t offset,
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struct crocus_bo *target, int32_t target_offset,
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unsigned int reloc_flags)
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{
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assert(target != NULL);
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bool writable = reloc_flags & RELOC_WRITE;
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struct drm_i915_gem_exec_object2 *entry =
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crocus_use_bo(batch, target, writable);
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if (rlist->reloc_count == rlist->reloc_array_size) {
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rlist->reloc_array_size *= 2;
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rlist->relocs = realloc(rlist->relocs,
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rlist->reloc_array_size *
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sizeof(struct drm_i915_gem_relocation_entry));
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}
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if (reloc_flags & RELOC_32BIT) {
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/* Restrict this buffer to the low 32 bits of the address space.
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*
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* Altering the validation list flags restricts it for this batch,
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* but we also alter the BO's kflags to restrict it permanently
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* (until the BO is destroyed and put back in the cache). Buffers
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* may stay bound across batches, and we want keep it constrained.
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*/
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target->kflags &= ~EXEC_OBJECT_SUPPORTS_48B_ADDRESS;
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entry->flags &= ~EXEC_OBJECT_SUPPORTS_48B_ADDRESS;
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/* RELOC_32BIT is not an EXEC_OBJECT_* flag, so get rid of it. */
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reloc_flags &= ~RELOC_32BIT;
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}
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if (reloc_flags)
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entry->flags |= reloc_flags & batch->valid_reloc_flags;
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rlist->relocs[rlist->reloc_count++] =
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(struct drm_i915_gem_relocation_entry) {
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.offset = offset,
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.delta = target_offset,
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.target_handle = target->index,
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.presumed_offset = entry->offset,
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};
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/* Using the old buffer offset, write in what the right data would be, in
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* case the buffer doesn't move and we can short-circuit the relocation
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* processing in the kernel
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*/
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return entry->offset + target_offset;
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}
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uint64_t
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crocus_command_reloc(struct crocus_batch *batch, uint32_t batch_offset,
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struct crocus_bo *target, uint32_t target_offset,
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unsigned int reloc_flags)
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{
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assert(batch_offset <= batch->command.bo->size - sizeof(uint32_t));
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return emit_reloc(batch, &batch->command.relocs, batch_offset,
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target, target_offset, reloc_flags);
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}
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uint64_t
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crocus_state_reloc(struct crocus_batch *batch, uint32_t state_offset,
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struct crocus_bo *target, uint32_t target_offset,
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unsigned int reloc_flags)
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{
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assert(state_offset <= batch->state.bo->size - sizeof(uint32_t));
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return emit_reloc(batch, &batch->state.relocs, state_offset,
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target, target_offset, reloc_flags);
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}
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static void
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recreate_growing_buffer(struct crocus_batch *batch,
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struct crocus_growing_bo *grow,
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const char *name, unsigned size)
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{
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struct crocus_screen *screen = batch->screen;
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struct crocus_bufmgr *bufmgr = screen->bufmgr;
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grow->bo = crocus_bo_alloc(bufmgr, name, size);
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grow->bo->kflags |= EXEC_OBJECT_CAPTURE;
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grow->partial_bo = NULL;
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grow->partial_bo_map = NULL;
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grow->partial_bytes = 0;
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if (batch->use_shadow_copy)
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grow->map = realloc(grow->map, grow->bo->size);
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else
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grow->map = crocus_bo_map(NULL, grow->bo, MAP_READ | MAP_WRITE);
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grow->map_next = grow->map;
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}
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static void
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create_batch(struct crocus_batch *batch)
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{
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struct crocus_screen *screen = batch->screen;
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recreate_growing_buffer(batch, &batch->command,
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"command buffer",
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BATCH_SZ + BATCH_RESERVED(&screen->devinfo));
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crocus_use_bo(batch, batch->command.bo, false);
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|
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recreate_growing_buffer(batch, &batch->state,
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"state buffer",
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STATE_SZ);
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|
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batch->state.used = 1;
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crocus_use_bo(batch, batch->state.bo, false);
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}
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|
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static void
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crocus_batch_maybe_noop(struct crocus_batch *batch)
|
|
{
|
|
/* We only insert the NOOP at the beginning of the batch. */
|
|
assert(crocus_batch_bytes_used(batch) == 0);
|
|
|
|
if (batch->noop_enabled) {
|
|
/* Emit MI_BATCH_BUFFER_END to prevent any further command to be
|
|
* executed.
|
|
*/
|
|
uint32_t *map = batch->command.map_next;
|
|
|
|
map[0] = (0xA << 23);
|
|
|
|
batch->command.map_next += 4;
|
|
}
|
|
}
|
|
|
|
static void
|
|
crocus_batch_reset(struct crocus_batch *batch)
|
|
{
|
|
struct crocus_screen *screen = batch->screen;
|
|
|
|
crocus_bo_unreference(batch->command.bo);
|
|
crocus_bo_unreference(batch->state.bo);
|
|
batch->primary_batch_size = 0;
|
|
batch->contains_draw = false;
|
|
batch->contains_fence_signal = false;
|
|
batch->state_base_address_emitted = false;
|
|
batch->screen->vtbl.batch_reset_dirty(batch);
|
|
|
|
create_batch(batch);
|
|
assert(batch->command.bo->index == 0);
|
|
|
|
if (batch->state_sizes)
|
|
_mesa_hash_table_u64_clear(batch->state_sizes);
|
|
struct crocus_syncobj *syncobj = crocus_create_syncobj(screen);
|
|
crocus_batch_add_syncobj(batch, syncobj, I915_EXEC_FENCE_SIGNAL);
|
|
crocus_syncobj_reference(screen, &syncobj, NULL);
|
|
|
|
crocus_cache_sets_clear(batch);
|
|
}
|
|
|
|
void
|
|
crocus_batch_free(struct crocus_batch *batch)
|
|
{
|
|
struct crocus_screen *screen = batch->screen;
|
|
struct crocus_bufmgr *bufmgr = screen->bufmgr;
|
|
|
|
if (batch->use_shadow_copy) {
|
|
free(batch->command.map);
|
|
free(batch->state.map);
|
|
}
|
|
|
|
for (int i = 0; i < batch->exec_count; i++) {
|
|
crocus_bo_unreference(batch->exec_bos[i]);
|
|
}
|
|
|
|
pipe_resource_reference(&batch->fine_fences.ref.res, NULL);
|
|
|
|
free(batch->command.relocs.relocs);
|
|
free(batch->state.relocs.relocs);
|
|
free(batch->exec_bos);
|
|
free(batch->validation_list);
|
|
|
|
ralloc_free(batch->exec_fences.mem_ctx);
|
|
|
|
util_dynarray_foreach(&batch->syncobjs, struct crocus_syncobj *, s)
|
|
crocus_syncobj_reference(screen, s, NULL);
|
|
ralloc_free(batch->syncobjs.mem_ctx);
|
|
|
|
crocus_fine_fence_reference(batch->screen, &batch->last_fence, NULL);
|
|
if (batch_has_fine_fence(batch))
|
|
u_upload_destroy(batch->fine_fences.uploader);
|
|
|
|
crocus_bo_unreference(batch->command.bo);
|
|
batch->command.bo = NULL;
|
|
batch->command.map = NULL;
|
|
batch->command.map_next = NULL;
|
|
|
|
crocus_destroy_hw_context(bufmgr, batch->hw_ctx_id);
|
|
|
|
_mesa_hash_table_destroy(batch->cache.render, NULL);
|
|
_mesa_set_destroy(batch->cache.depth, NULL);
|
|
|
|
if (batch->state_sizes) {
|
|
_mesa_hash_table_u64_destroy(batch->state_sizes);
|
|
intel_batch_decode_ctx_finish(&batch->decoder);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* If we've chained to a secondary batch, or are getting near to the end,
|
|
* then flush. This should only be called between draws.
|
|
*/
|
|
void
|
|
crocus_batch_maybe_flush(struct crocus_batch *batch, unsigned estimate)
|
|
{
|
|
if (batch->command.bo != batch->exec_bos[0] ||
|
|
crocus_batch_bytes_used(batch) + estimate >= BATCH_SZ) {
|
|
crocus_batch_flush(batch);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Finish copying the old batch/state buffer's contents to the new one
|
|
* after we tried to "grow" the buffer in an earlier operation.
|
|
*/
|
|
static void
|
|
finish_growing_bos(struct crocus_growing_bo *grow)
|
|
{
|
|
struct crocus_bo *old_bo = grow->partial_bo;
|
|
if (!old_bo)
|
|
return;
|
|
|
|
memcpy(grow->map, grow->partial_bo_map, grow->partial_bytes);
|
|
|
|
grow->partial_bo = NULL;
|
|
grow->partial_bo_map = NULL;
|
|
grow->partial_bytes = 0;
|
|
|
|
crocus_bo_unreference(old_bo);
|
|
}
|
|
|
|
void
|
|
crocus_grow_buffer(struct crocus_batch *batch, bool grow_state,
|
|
unsigned used,
|
|
unsigned new_size)
|
|
{
|
|
struct crocus_screen *screen = batch->screen;
|
|
struct crocus_bufmgr *bufmgr = screen->bufmgr;
|
|
struct crocus_growing_bo *grow = grow_state ? &batch->state : &batch->command;
|
|
struct crocus_bo *bo = grow->bo;
|
|
|
|
if (grow->partial_bo) {
|
|
/* We've already grown once, and now we need to do it again.
|
|
* Finish our last grow operation so we can start a new one.
|
|
* This should basically never happen.
|
|
*/
|
|
finish_growing_bos(grow);
|
|
}
|
|
|
|
struct crocus_bo *new_bo = crocus_bo_alloc(bufmgr, bo->name, new_size);
|
|
|
|
/* Copy existing data to the new larger buffer */
|
|
grow->partial_bo_map = grow->map;
|
|
|
|
if (batch->use_shadow_copy) {
|
|
/* We can't safely use realloc, as it may move the existing buffer,
|
|
* breaking existing pointers the caller may still be using. Just
|
|
* malloc a new copy and memcpy it like the normal BO path.
|
|
*
|
|
* Use bo->size rather than new_size because the bufmgr may have
|
|
* rounded up the size, and we want the shadow size to match.
|
|
*/
|
|
grow->map = malloc(new_bo->size);
|
|
} else {
|
|
grow->map = crocus_bo_map(NULL, new_bo, MAP_READ | MAP_WRITE);
|
|
}
|
|
/* Try to put the new BO at the same GTT offset as the old BO (which
|
|
* we're throwing away, so it doesn't need to be there).
|
|
*
|
|
* This guarantees that our relocations continue to work: values we've
|
|
* already written into the buffer, values we're going to write into the
|
|
* buffer, and the validation/relocation lists all will match.
|
|
*
|
|
* Also preserve kflags for EXEC_OBJECT_CAPTURE.
|
|
*/
|
|
new_bo->gtt_offset = bo->gtt_offset;
|
|
new_bo->index = bo->index;
|
|
new_bo->kflags = bo->kflags;
|
|
|
|
/* Batch/state buffers are per-context, and if we've run out of space,
|
|
* we must have actually used them before, so...they will be in the list.
|
|
*/
|
|
assert(bo->index < batch->exec_count);
|
|
assert(batch->exec_bos[bo->index] == bo);
|
|
|
|
/* Update the validation list to use the new BO. */
|
|
batch->validation_list[bo->index].handle = new_bo->gem_handle;
|
|
/* Exchange the two BOs...without breaking pointers to the old BO.
|
|
*
|
|
* Consider this scenario:
|
|
*
|
|
* 1. Somebody calls brw_state_batch() to get a region of memory, and
|
|
* and then creates a brw_address pointing to brw->batch.state.bo.
|
|
* 2. They then call brw_state_batch() a second time, which happens to
|
|
* grow and replace the state buffer. They then try to emit a
|
|
* relocation to their first section of memory.
|
|
*
|
|
* If we replace the brw->batch.state.bo pointer at step 2, we would
|
|
* break the address created in step 1. They'd have a pointer to the
|
|
* old destroyed BO. Emitting a relocation would add this dead BO to
|
|
* the validation list...causing /both/ statebuffers to be in the list,
|
|
* and all kinds of disasters.
|
|
*
|
|
* This is not a contrived case - BLORP vertex data upload hits this.
|
|
*
|
|
* There are worse scenarios too. Fences for GL sync objects reference
|
|
* brw->batch.batch.bo. If we replaced the batch pointer when growing,
|
|
* we'd need to chase down every fence and update it to point to the
|
|
* new BO. Otherwise, it would refer to a "batch" that never actually
|
|
* gets submitted, and would fail to trigger.
|
|
*
|
|
* To work around both of these issues, we transmutate the buffers in
|
|
* place, making the existing struct brw_bo represent the new buffer,
|
|
* and "new_bo" represent the old BO. This is highly unusual, but it
|
|
* seems like a necessary evil.
|
|
*
|
|
* We also defer the memcpy of the existing batch's contents. Callers
|
|
* may make multiple brw_state_batch calls, and retain pointers to the
|
|
* old BO's map. We'll perform the memcpy in finish_growing_bo() when
|
|
* we finally submit the batch, at which point we've finished uploading
|
|
* state, and nobody should have any old references anymore.
|
|
*
|
|
* To do that, we keep a reference to the old BO in grow->partial_bo,
|
|
* and store the number of bytes to copy in grow->partial_bytes. We
|
|
* can monkey with the refcounts directly without atomics because these
|
|
* are per-context BOs and they can only be touched by this thread.
|
|
*/
|
|
assert(new_bo->refcount == 1);
|
|
new_bo->refcount = bo->refcount;
|
|
bo->refcount = 1;
|
|
|
|
struct crocus_bo tmp;
|
|
memcpy(&tmp, bo, sizeof(struct crocus_bo));
|
|
memcpy(bo, new_bo, sizeof(struct crocus_bo));
|
|
memcpy(new_bo, &tmp, sizeof(struct crocus_bo));
|
|
|
|
grow->partial_bo = new_bo; /* the one reference of the OLD bo */
|
|
grow->partial_bytes = used;
|
|
}
|
|
|
|
static void
|
|
finish_seqno(struct crocus_batch *batch)
|
|
{
|
|
struct crocus_fine_fence *sq = crocus_fine_fence_new(batch, CROCUS_FENCE_END);
|
|
if (!sq)
|
|
return;
|
|
|
|
crocus_fine_fence_reference(batch->screen, &batch->last_fence, sq);
|
|
crocus_fine_fence_reference(batch->screen, &sq, NULL);
|
|
}
|
|
|
|
/**
|
|
* Terminate a batch with MI_BATCH_BUFFER_END.
|
|
*/
|
|
static void
|
|
crocus_finish_batch(struct crocus_batch *batch)
|
|
{
|
|
|
|
batch->no_wrap = true;
|
|
if (batch->screen->vtbl.finish_batch)
|
|
batch->screen->vtbl.finish_batch(batch);
|
|
|
|
finish_seqno(batch);
|
|
|
|
/* Emit MI_BATCH_BUFFER_END to finish our batch. */
|
|
uint32_t *map = batch->command.map_next;
|
|
|
|
map[0] = (0xA << 23);
|
|
|
|
batch->command.map_next += 4;
|
|
VG(VALGRIND_CHECK_MEM_IS_DEFINED(batch->command.map, crocus_batch_bytes_used(batch)));
|
|
|
|
if (batch->command.bo == batch->exec_bos[0])
|
|
batch->primary_batch_size = crocus_batch_bytes_used(batch);
|
|
batch->no_wrap = false;
|
|
}
|
|
|
|
/**
|
|
* Replace our current GEM context with a new one (in case it got banned).
|
|
*/
|
|
static bool
|
|
replace_hw_ctx(struct crocus_batch *batch)
|
|
{
|
|
struct crocus_screen *screen = batch->screen;
|
|
struct crocus_bufmgr *bufmgr = screen->bufmgr;
|
|
|
|
uint32_t new_ctx = crocus_clone_hw_context(bufmgr, batch->hw_ctx_id);
|
|
if (!new_ctx)
|
|
return false;
|
|
|
|
crocus_destroy_hw_context(bufmgr, batch->hw_ctx_id);
|
|
batch->hw_ctx_id = new_ctx;
|
|
|
|
/* Notify the context that state must be re-initialized. */
|
|
crocus_lost_context_state(batch);
|
|
|
|
return true;
|
|
}
|
|
|
|
enum pipe_reset_status
|
|
crocus_batch_check_for_reset(struct crocus_batch *batch)
|
|
{
|
|
struct crocus_screen *screen = batch->screen;
|
|
enum pipe_reset_status status = PIPE_NO_RESET;
|
|
struct drm_i915_reset_stats stats = { .ctx_id = batch->hw_ctx_id };
|
|
|
|
if (drmIoctl(screen->fd, DRM_IOCTL_I915_GET_RESET_STATS, &stats))
|
|
DBG("DRM_IOCTL_I915_GET_RESET_STATS failed: %s\n", strerror(errno));
|
|
|
|
if (stats.batch_active != 0) {
|
|
/* A reset was observed while a batch from this hardware context was
|
|
* executing. Assume that this context was at fault.
|
|
*/
|
|
status = PIPE_GUILTY_CONTEXT_RESET;
|
|
} else if (stats.batch_pending != 0) {
|
|
/* A reset was observed while a batch from this context was in progress,
|
|
* but the batch was not executing. In this case, assume that the
|
|
* context was not at fault.
|
|
*/
|
|
status = PIPE_INNOCENT_CONTEXT_RESET;
|
|
}
|
|
|
|
if (status != PIPE_NO_RESET) {
|
|
/* Our context is likely banned, or at least in an unknown state.
|
|
* Throw it away and start with a fresh context. Ideally this may
|
|
* catch the problem before our next execbuf fails with -EIO.
|
|
*/
|
|
replace_hw_ctx(batch);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* Submit the batch to the GPU via execbuffer2.
|
|
*/
|
|
static int
|
|
submit_batch(struct crocus_batch *batch)
|
|
{
|
|
|
|
if (batch->use_shadow_copy) {
|
|
void *bo_map = crocus_bo_map(batch->dbg, batch->command.bo, MAP_WRITE);
|
|
memcpy(bo_map, batch->command.map, crocus_batch_bytes_used(batch));
|
|
|
|
bo_map = crocus_bo_map(batch->dbg, batch->state.bo, MAP_WRITE);
|
|
memcpy(bo_map, batch->state.map, batch->state.used);
|
|
}
|
|
|
|
crocus_bo_unmap(batch->command.bo);
|
|
crocus_bo_unmap(batch->state.bo);
|
|
|
|
/* The requirement for using I915_EXEC_NO_RELOC are:
|
|
*
|
|
* The addresses written in the objects must match the corresponding
|
|
* reloc.gtt_offset which in turn must match the corresponding
|
|
* execobject.offset.
|
|
*
|
|
* Any render targets written to in the batch must be flagged with
|
|
* EXEC_OBJECT_WRITE.
|
|
*
|
|
* To avoid stalling, execobject.offset should match the current
|
|
* address of that object within the active context.
|
|
*/
|
|
/* Set statebuffer relocations */
|
|
const unsigned state_index = batch->state.bo->index;
|
|
if (state_index < batch->exec_count &&
|
|
batch->exec_bos[state_index] == batch->state.bo) {
|
|
struct drm_i915_gem_exec_object2 *entry =
|
|
&batch->validation_list[state_index];
|
|
assert(entry->handle == batch->state.bo->gem_handle);
|
|
entry->relocation_count = batch->state.relocs.reloc_count;
|
|
entry->relocs_ptr = (uintptr_t)batch->state.relocs.relocs;
|
|
}
|
|
|
|
/* Set batchbuffer relocations */
|
|
struct drm_i915_gem_exec_object2 *entry = &batch->validation_list[0];
|
|
assert(entry->handle == batch->command.bo->gem_handle);
|
|
entry->relocation_count = batch->command.relocs.reloc_count;
|
|
entry->relocs_ptr = (uintptr_t)batch->command.relocs.relocs;
|
|
|
|
struct drm_i915_gem_execbuffer2 execbuf = {
|
|
.buffers_ptr = (uintptr_t)batch->validation_list,
|
|
.buffer_count = batch->exec_count,
|
|
.batch_start_offset = 0,
|
|
/* This must be QWord aligned. */
|
|
.batch_len = ALIGN(batch->primary_batch_size, 8),
|
|
.flags = I915_EXEC_RENDER |
|
|
I915_EXEC_NO_RELOC |
|
|
I915_EXEC_BATCH_FIRST |
|
|
I915_EXEC_HANDLE_LUT,
|
|
.rsvd1 = batch->hw_ctx_id, /* rsvd1 is actually the context ID */
|
|
};
|
|
|
|
if (num_fences(batch)) {
|
|
execbuf.flags |= I915_EXEC_FENCE_ARRAY;
|
|
execbuf.num_cliprects = num_fences(batch);
|
|
execbuf.cliprects_ptr =
|
|
(uintptr_t)util_dynarray_begin(&batch->exec_fences);
|
|
}
|
|
|
|
int ret = 0;
|
|
if (!batch->screen->no_hw &&
|
|
intel_ioctl(batch->screen->fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf))
|
|
ret = -errno;
|
|
|
|
for (int i = 0; i < batch->exec_count; i++) {
|
|
struct crocus_bo *bo = batch->exec_bos[i];
|
|
|
|
bo->idle = false;
|
|
bo->index = -1;
|
|
|
|
/* Update brw_bo::gtt_offset */
|
|
if (batch->validation_list[i].offset != bo->gtt_offset) {
|
|
DBG("BO %d migrated: 0x%" PRIx64 " -> 0x%llx\n",
|
|
bo->gem_handle, bo->gtt_offset,
|
|
batch->validation_list[i].offset);
|
|
assert(!(bo->kflags & EXEC_OBJECT_PINNED));
|
|
bo->gtt_offset = batch->validation_list[i].offset;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const char *
|
|
batch_name_to_string(enum crocus_batch_name name)
|
|
{
|
|
const char *names[CROCUS_BATCH_COUNT] = {
|
|
[CROCUS_BATCH_RENDER] = "render",
|
|
[CROCUS_BATCH_COMPUTE] = "compute",
|
|
};
|
|
return names[name];
|
|
}
|
|
|
|
/**
|
|
* Flush the batch buffer, submitting it to the GPU and resetting it so
|
|
* we're ready to emit the next batch.
|
|
*
|
|
* \param in_fence_fd is ignored if -1. Otherwise, this function takes
|
|
* ownership of the fd.
|
|
*
|
|
* \param out_fence_fd is ignored if NULL. Otherwise, the caller must
|
|
* take ownership of the returned fd.
|
|
*/
|
|
void
|
|
_crocus_batch_flush(struct crocus_batch *batch, const char *file, int line)
|
|
{
|
|
struct crocus_screen *screen = batch->screen;
|
|
|
|
/* If a fence signals we need to flush it. */
|
|
if (crocus_batch_bytes_used(batch) == 0 && !batch->contains_fence_signal)
|
|
return;
|
|
|
|
assert(!batch->no_wrap);
|
|
crocus_finish_batch(batch);
|
|
|
|
finish_growing_bos(&batch->command);
|
|
finish_growing_bos(&batch->state);
|
|
int ret = submit_batch(batch);
|
|
|
|
if (unlikely(INTEL_DEBUG &
|
|
(DEBUG_BATCH | DEBUG_SUBMIT | DEBUG_PIPE_CONTROL))) {
|
|
int bytes_for_commands = crocus_batch_bytes_used(batch);
|
|
int second_bytes = 0;
|
|
if (batch->command.bo != batch->exec_bos[0]) {
|
|
second_bytes = bytes_for_commands;
|
|
bytes_for_commands += batch->primary_batch_size;
|
|
}
|
|
fprintf(stderr, "%19s:%-3d: %s batch [%u] flush with %5d+%5db (%0.1f%%) "
|
|
"(cmds), %4d BOs (%0.1fMb aperture),"
|
|
" %4d command relocs, %4d state relocs\n",
|
|
file, line, batch_name_to_string(batch->name), batch->hw_ctx_id,
|
|
batch->primary_batch_size, second_bytes,
|
|
100.0f * bytes_for_commands / BATCH_SZ,
|
|
batch->exec_count,
|
|
(float) batch->aperture_space / (1024 * 1024),
|
|
batch->command.relocs.reloc_count,
|
|
batch->state.relocs.reloc_count);
|
|
|
|
if (INTEL_DEBUG & (DEBUG_BATCH | DEBUG_SUBMIT)) {
|
|
dump_fence_list(batch);
|
|
dump_validation_list(batch);
|
|
}
|
|
|
|
if (INTEL_DEBUG & DEBUG_BATCH) {
|
|
decode_batch(batch);
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < batch->exec_count; i++) {
|
|
struct crocus_bo *bo = batch->exec_bos[i];
|
|
crocus_bo_unreference(bo);
|
|
}
|
|
|
|
batch->command.relocs.reloc_count = 0;
|
|
batch->state.relocs.reloc_count = 0;
|
|
batch->exec_count = 0;
|
|
batch->aperture_space = 0;
|
|
|
|
util_dynarray_foreach(&batch->syncobjs, struct crocus_syncobj *, s)
|
|
crocus_syncobj_reference(screen, s, NULL);
|
|
util_dynarray_clear(&batch->syncobjs);
|
|
|
|
util_dynarray_clear(&batch->exec_fences);
|
|
|
|
if (unlikely(INTEL_DEBUG & DEBUG_SYNC)) {
|
|
dbg_printf("waiting for idle\n");
|
|
crocus_bo_wait_rendering(batch->command.bo); /* if execbuf failed; this is a nop */
|
|
}
|
|
|
|
/* Start a new batch buffer. */
|
|
crocus_batch_reset(batch);
|
|
|
|
/* EIO means our context is banned. In this case, try and replace it
|
|
* with a new logical context, and inform crocus_context that all state
|
|
* has been lost and needs to be re-initialized. If this succeeds,
|
|
* dubiously claim success...
|
|
*/
|
|
if (ret == -EIO && replace_hw_ctx(batch)) {
|
|
if (batch->reset->reset) {
|
|
/* Tell the state tracker the device is lost and it was our fault. */
|
|
batch->reset->reset(batch->reset->data, PIPE_GUILTY_CONTEXT_RESET);
|
|
}
|
|
|
|
ret = 0;
|
|
}
|
|
|
|
if (ret < 0) {
|
|
#ifdef DEBUG
|
|
const bool color = INTEL_DEBUG & DEBUG_COLOR;
|
|
fprintf(stderr, "%scrocus: Failed to submit batchbuffer: %-80s%s\n",
|
|
color ? "\e[1;41m" : "", strerror(-ret), color ? "\e[0m" : "");
|
|
#endif
|
|
abort();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Does the current batch refer to the given BO?
|
|
*
|
|
* (In other words, is the BO in the current batch's validation list?)
|
|
*/
|
|
bool
|
|
crocus_batch_references(struct crocus_batch *batch, struct crocus_bo *bo)
|
|
{
|
|
return find_validation_entry(batch, bo) != NULL;
|
|
}
|
|
|
|
/**
|
|
* Updates the state of the noop feature. Returns true if there was a noop
|
|
* transition that led to state invalidation.
|
|
*/
|
|
bool
|
|
crocus_batch_prepare_noop(struct crocus_batch *batch, bool noop_enable)
|
|
{
|
|
if (batch->noop_enabled == noop_enable)
|
|
return 0;
|
|
|
|
batch->noop_enabled = noop_enable;
|
|
|
|
crocus_batch_flush(batch);
|
|
|
|
/* If the batch was empty, flush had no effect, so insert our noop. */
|
|
if (crocus_batch_bytes_used(batch) == 0)
|
|
crocus_batch_maybe_noop(batch);
|
|
|
|
/* We only need to update the entire state if we transition from noop ->
|
|
* not-noop.
|
|
*/
|
|
return !batch->noop_enabled;
|
|
}
|