drivers/gpu/msd-vsl-gc/src/msd_vsl_buffer.h

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MSD_VSL_BUFFER_H
#define MSD_VSL_BUFFER_H

#include "magma_util/macros.h"
#include "msd.h"
#include "platform_buffer.h"

class MsdVslBuffer {
public:
    static std::unique_ptr<MsdVslBuffer> Import(uint32_t handle);
    static std::unique_ptr<MsdVslBuffer> Create(uint64_t size, const char* name);

    magma::PlatformBuffer* platform_buffer()
    {
        DASSERT(platform_buf_);
        return platform_buf_.get();
    }

    MsdVslBuffer(std::unique_ptr<magma::PlatformBuffer> platform_buf)
        : platform_buf_(std::move(platform_buf))
    {
    }

private:
    std::unique_ptr<magma::PlatformBuffer> platform_buf_;
};

class MsdVslAbiBuffer : public msd_buffer_t {
public:
    MsdVslAbiBuffer(std::shared_ptr<MsdVslBuffer> ptr) : ptr_(std::move(ptr)) { magic_ = kMagic; }

    static MsdVslAbiBuffer* cast(msd_buffer_t* buf)
    {
        DASSERT(buf);
        DASSERT(buf->magic_ == kMagic);
        return static_cast<MsdVslAbiBuffer*>(buf);
    }
    std::shared_ptr<MsdVslBuffer> ptr() { return ptr_; }

private:
    std::shared_ptr<MsdVslBuffer> ptr_;
    static const uint32_t kMagic = 0x62756666; // "buff"
};

#endif // MSD_VSL_BUFFER_H