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/*
* Copyright (C) 2019 Alyssa Rosenzweig
*
* 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
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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 <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <panfrost-job.h>
#include "pan_trace.h"
#include "util/list.h"
/* The pandecode utility is capable of parsing a command stream trace and
* disassembling any referenced shaders. Traces themselves are glorified memory
* dumps, a directory consisting of .bin's for each memory segment, and a
* simple plain-text description of the interesting kernel activity.
* Historically, these dumps have been produced via panwrap, an LD_PRELOAD shim
* sitting between the driver and the kernel. However, for modern Panfrost, we
* can just produce the dumps ourselves, which is rather less fragile. This
* file (pantrace) implements this functionality. */
static FILE *pan_control_log;
static const char *pan_control_base;
/* Represent the abstraction for a single mmap chunk */
static unsigned pantrace_memory_count = 0;
struct pantrace_memory {
struct list_head node;
mali_ptr gpu;
void *cpu;
size_t sz;
char *full_filename;
};
static struct pantrace_memory mmaps;
void
pantrace_initialize(const char *base)
{
/* Open the control.log */
char fn[128];
snprintf(fn, 128, "%s/control.log", base);
pan_control_log = fopen(fn, "w+");
assert(pan_control_log);
/* Save the base for later */
pan_control_base = base;
/* Initialize the mmap list */
list_inithead(&mmaps.node);
}
static bool
pantrace_is_initialized(void)
{
return pan_control_log && pan_control_base;
}
/* Traces a submitted job with a given job chain, core requirements, and
* platform */
void
pantrace_submit_job(mali_ptr jc, unsigned core_req, unsigned is_bifrost)
{
if (!pantrace_is_initialized())
return;
fprintf(pan_control_log, "JS %" PRIx64 " %x %x\n",
jc, core_req, is_bifrost);
fflush(pan_control_log);
}
/* Dumps a given mapped memory buffer with the given label. If no label
* is given (label == NULL), one is created */
void
pantrace_mmap(mali_ptr gpu, void *cpu, size_t sz, char *label)
{
if (!pantrace_is_initialized())
return;
char *filename = NULL;
char *full_filename = NULL;
/* Create a filename based on the label or count */
if (label) {
asprintf(&filename, "%s.bin", label);
} else {
asprintf(&filename, "memory_%d.bin", pantrace_memory_count++);
}
/* Emit an mmap for it */
fprintf(pan_control_log, "MMAP %" PRIx64 " %s\n", gpu, filename);
fflush(pan_control_log);
/* Dump the memory itself */
asprintf(&full_filename, "%s/%s", pan_control_base, filename);
free(filename);
struct pantrace_memory *mem = malloc(sizeof(*mem));
list_inithead(&mem->node);
mem->gpu = gpu;
mem->cpu = cpu;
mem->sz = sz;
mem->full_filename = full_filename;
list_add(&mem->node, &mmaps.node);
}
/* Dump all memory at once, once everything has been written */
void
pantrace_dump_memory(void)
{
if (!pantrace_is_initialized())
return;
list_for_each_entry(struct pantrace_memory, pos, &mmaps.node, node) {
/* Save the mapping */
FILE *fp = fopen(pos->full_filename, "wb");
fwrite(pos->cpu, 1, pos->sz, fp);
fclose(fp);
}
}
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