system/dev/pci/designware/include/dev/pci/designware/dw-pcie.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

#pragma once

#include <stdint.h>

#include <ddktl/mmio.h>
#include <fbl/unique_ptr.h>
#include <zircon/types.h>

#include <dev/pci/designware/atu-cfg.h>

#include <utility>

namespace pcie {
namespace designware {

class DwPcie {
protected:
    DwPcie(ddk::MmioBuffer dbi, ddk::MmioBuffer cfg,
           const uint32_t nLanes)
        : dbi_(std::move(dbi)), cfg_(std::move(cfg)), nLanes_(nLanes) {}
    virtual ~DwPcie() {}

    virtual bool IsLinkUp();

    virtual uint32_t ReadRC(const uint32_t offset);
    virtual void WriteRC(const uint32_t offset, const uint32_t val);

    zx_status_t SetupRootComplex(
        const iatu_translation_entry_t* cfg,
        const iatu_translation_entry_t* io,
        const iatu_translation_entry_t* mem);

    ddk::MmioBuffer dbi_;
    ddk::MmioBuffer cfg_;
    const uint32_t nLanes_;

private:
    void LinkSpeedChange();
    zx_status_t ProgramOutboundAtu(const uint32_t index, const uint32_t type,
                                   const zx_paddr_t cpu_addr,
                                   const uintptr_t pci_addr, const size_t sz);
};

} // namespace designware
} // namespace pcie