blob: 34045f48b3acf6f9eebfc2484d94d1d5f6ff7d54 [file] [log] [blame]
// 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.
#pragma once
#include <ddk/protocol/pciroot.h>
#include <region-alloc/region-alloc.h>
#include <string.h>
pciroot_protocol_ops_t* get_pciroot_ops(void);
// Userspace ACPI/PCI support is entirely in C++, but the legacy kernel pci support
// still has kpci.c. In lieu of needlessly porting that, it's simpler to ifdef the
// DDKTL usage away from it until we can remove it entirely.
#ifdef __cplusplus
#include "pci.h"
#include <ddktl/device.h>
#include <ddktl/protocol/pciroot.h>
#include <fbl/alloc_checker.h>
#include <fbl/unique_ptr.h>
#include <lib/zx/bti.h>
class Pciroot;
using PcirootType = ddk::Device<Pciroot>;
class Pciroot : public PcirootType, public ddk::PcirootProtocol<Pciroot, ddk::base_protocol> {
static zx_status_t Create(fbl::unique_ptr<pciroot_ctx_t> ctx, zx_device_t* parent,
zx_device_t* platform_bus, const char* name);
zx_status_t PcirootGetAuxdata(const char* args, void* out_data, size_t data_size,
size_t* out_data_actual);
zx_status_t PcirootGetBti(uint32_t bdf, uint32_t index, zx::bti* bti);
zx_status_t PcirootGetPciPlatformInfo(pci_platform_info_t* info);
zx_status_t PcirootGetPciIrqInfo(pci_irq_info_t* info);
// If |true| is returned by the Pciroot implementation then the bus driver
// will send all config space reads and writes over the Pciroot protocol
// rather than in the bus driver using MMIO/IO access.
bool PcirootDriverShouldProxyConfig(void);
// Config space read/write accessors for PCI systems that require platform
// bus to configure something before config space is accessible. For ACPI
// systems we only intend to use PIO access if MMIO config is unavailable.
// In the event we do use them though, we're restricted to the base 256 byte
// PCI config header.
zx_status_t PcirootConfigRead8(const pci_bdf_t* address, uint16_t offset, uint8_t* value);
zx_status_t PcirootConfigRead16(const pci_bdf_t* address, uint16_t offset, uint16_t* value);
zx_status_t PcirootConfigRead32(const pci_bdf_t* address, uint16_t offset, uint32_t* value);
zx_status_t PcirootConfigWrite8(const pci_bdf_t* address, uint16_t offset, uint8_t value);
zx_status_t PcirootConfigWrite16(const pci_bdf_t* address, uint16_t offset, uint16_t value);
zx_status_t PcirootConfigWrite32(const pci_bdf_t* address, uint16_t offset, uint32_t value);
// These methods may not exist in usable implementations and are a
// prototyping side effect. It likely will not make sense for MSI blocks to
// be dealt with in the PCI driver itself if we can help it.
zx_status_t PcirootAllocMsiBlock(uint64_t requested_irqs, bool can_target_64bit,
msi_block_t* out_block);
zx_status_t PcirootFreeMsiBlock(const msi_block_t* block);
zx_status_t PcirootMaskUnmaskMsi(uint64_t msi_id, bool mask);
// These methods correspond to address space reservations needed by the bus
// driver for providing a place to map bridges and bars.
zx_status_t PcirootGetAddressSpace(zx_paddr_t in_base, size_t len, pci_address_space_t type,
bool low, uint64_t* out_base, zx::resource* resource);
zx_status_t PcirootFreeAddressSpace(uint64_t base, size_t len, pci_address_space_t type);
// DDK mix-in impls
void DdkRelease(void) { delete this; }
// Accessors
// TODO(cja): Remove this when we no longer share get_auxdata/get_bti with
// the kernel pci bus driver's C interface.
void* c_context(void) { return static_cast<void*>(ctx_.get()); }
char name_[8];
Pciroot(fbl::unique_ptr<pciroot_ctx_t> ctx, zx_device_t* parent, zx_device_t* platform_bus,
const char* name)
: PcirootType(parent), ctx_(std::move(ctx)), platform_bus_(platform_bus) {}
fbl::unique_ptr<pciroot_ctx_t> ctx_;
zx_device_t* platform_bus_;