system/dev/bus/acpi/include/pci.h

// Copyright 2016 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 ZIRCON_SYSTEM_DEV_BUS_ACPI_INCLUDE_PCI_H_
#define ZIRCON_SYSTEM_DEV_BUS_ACPI_INCLUDE_PCI_H_

#include <acpica/acpi.h>
#include <acpica/actypes.h>
#include <ddk/device.h>
#include <ddk/protocol/pciroot.h>
#include <zircon/compiler.h>
#include <zircon/syscalls/pci.h>

#include "acpi-private.h"

__BEGIN_CDECLS;

// It would be nice to use the hwreg library here, but these structs should be kept
// simple so that it can be passed across process boundaries.

// Base Address Allocation Structure, defined in PCI firmware spec v3.2 chapter 4.1.2
typedef struct pci_ecam_baas {
    uint64_t base_address;
    uint16_t segment_group;
    uint8_t start_bus_num;
    uint8_t end_bus_num;
    uint32_t reserved0;
} pci_mcfg_allocation_t;

typedef struct pciroot_ctx {
    char name[5];
    ACPI_HANDLE acpi_object;
    ACPI_DEVICE_INFO acpi_device_info;
    struct pci_platform_info info;
    zx_device_t* zxdev;
} pciroot_ctx_t;

zx_status_t pci_init(zx_device_t* parent, ACPI_HANDLE object, ACPI_DEVICE_INFO* info, publish_acpi_device_ctx_t* ctx);
void register_pci_root(ACPI_HANDLE dev_obj);
bool pci_platform_has_mcfg(void);

zx_status_t get_pci_init_arg(zx_pci_init_arg_t** arg, uint32_t* size);
zx_status_t pci_report_current_resources(zx_handle_t root_resource_handle);

__END_CDECLS;

#endif // ZIRCON_SYSTEM_DEV_BUS_ACPI_INCLUDE_PCI_H_