/*
 * Copyright (C) 2017-2019 Lyude Paul
 * Copyright (C) 2017-2019 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.
 *
 */

#ifndef __PAN_DECODE_H__
#define __PAN_DECODE_H__

#include "public.h"
#include "util/list.h"

struct pandecode_mapped_memory {
        struct list_head node;

        size_t length;

        void *addr;
        uint64_t gpu_va;

        char name[32];
};

char *pointer_as_memory_reference(uint64_t ptr);

struct pandecode_mapped_memory *pandecode_find_mapped_gpu_mem_containing(uint64_t addr);

static inline void *
__pandecode_fetch_gpu_mem(const struct pandecode_mapped_memory *mem,
                          uint64_t gpu_va, size_t size,
                          int line, const char *filename)
{
        if (!mem)
                mem = pandecode_find_mapped_gpu_mem_containing(gpu_va);

        if (!mem) {
                fprintf(stderr, "Access to unknown memory %" PRIx64 " in %s:%d",
                        gpu_va, filename, line);
                assert(0);
        }

        assert(mem);
        assert(size + (gpu_va - mem->gpu_va) <= mem->length);

        return mem->addr + gpu_va - mem->gpu_va;
}

#define pandecode_fetch_gpu_mem(mem, gpu_va, size) \
	__pandecode_fetch_gpu_mem(mem, gpu_va, size, __LINE__, __FILE__)

/* Returns a validated pointer to mapped GPU memory with the given pointer type,
 * size automatically determined from the pointer type
 */
#define PANDECODE_PTR(mem, gpu_va, type) \
	((type*)(__pandecode_fetch_gpu_mem(mem, gpu_va, sizeof(type), \
					 __LINE__, __FILE__)))

/* Usage: <variable type> PANDECODE_PTR_VAR(name, mem, gpu_va) */
#define PANDECODE_PTR_VAR(name, mem, gpu_va) \
	name = __pandecode_fetch_gpu_mem(mem, gpu_va, sizeof(*name), \
				       __LINE__, __FILE__)

#endif /* __MMAP_TRACE_H__ */