182 lines
4.3 KiB
C++
182 lines
4.3 KiB
C++
/*
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* \brief PCI bus access
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* \author Christian Helmuth
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* \date 2008-10-22
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*
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* We provide a virtual PCI bus hierarchy in pci_tree.cc:
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*
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* - Grab all accessible devices at pci_drv and populate virtual bus hierarchy.
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* (This also works if parents/device managers limit device access in the
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* future.)
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* - DDE kit C interface in pci.cc
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* - Read/write config space
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* - Convenience functions
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*/
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/*
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* Copyright (C) 2008-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#include <base/printf.h>
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#include <dataspace/client.h>
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#include <io_port_session/capability.h>
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extern "C" {
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#include <dde_kit/pci.h>
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#include <dde_kit/pgtab.h>
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}
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#include "pci_tree.h"
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#include "device.h"
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static const bool verbose = false;
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static Dde_kit::Pci_tree *pci_tree(unsigned device_class = 0,
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unsigned class_mask = 0)
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{
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static Dde_kit::Pci_tree _pci_tree(device_class, class_mask);
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return &_pci_tree;
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}
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Genode::Io_port_session_capability Dde_kit::Device::io_port(int bus, int dev, int fun, unsigned short bda) {
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return pci_tree()->io_port(bus, dev, fun, bda); }
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/********************************
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** Configuration space access **
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********************************/
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extern "C" void dde_kit_pci_readb(int bus, int dev, int fun, int pos, dde_kit_uint8_t *val)
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{
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try {
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*val = pci_tree()->config_read(bus, dev, fun, pos, Pci::Device::ACCESS_8BIT) & 0xff;
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} catch (...) {
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if (verbose)
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PWRN("PCI device %02x:%02x.%x not found", bus, dev, fun);
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*val = ~0;
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}
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}
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extern "C" void dde_kit_pci_readw(int bus, int dev, int fun, int pos, dde_kit_uint16_t *val)
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{
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try {
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*val = pci_tree()->config_read(bus, dev, fun, pos, Pci::Device::ACCESS_16BIT) & 0xffff;
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} catch (...) {
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if (verbose)
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PWRN("PCI device %02x:%02x.%x not found", bus, dev, fun);
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*val = ~0;
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}
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}
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extern "C" void dde_kit_pci_readl(int bus, int dev, int fun, int pos, dde_kit_uint32_t *val)
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{
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try {
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*val = pci_tree()->config_read(bus, dev, fun, pos, Pci::Device::ACCESS_32BIT);
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} catch (...) {
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if (verbose)
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PWRN("PCI device %02x:%02x.%x not found", bus, dev, fun);
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*val = ~0;
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}
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}
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extern "C" void dde_kit_pci_writeb(int bus, int dev, int fun, int pos, dde_kit_uint8_t val)
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{
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try {
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pci_tree()->config_write(bus, dev, fun, pos, val, Pci::Device::ACCESS_8BIT);
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} catch (...) {
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if (verbose)
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PWRN("PCI device %02x:%02x.%x not found", bus, dev, fun);
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}
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}
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extern "C" void dde_kit_pci_writew(int bus, int dev, int fun, int pos, dde_kit_uint16_t val)
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{
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try {
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pci_tree()->config_write(bus, dev, fun, pos, val, Pci::Device::ACCESS_16BIT);
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} catch (...) {
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if (verbose)
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PWRN("PCI device %02x:%02x.%x not found", bus, dev, fun);
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}
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}
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extern "C" void dde_kit_pci_writel(int bus, int dev, int fun, int pos, dde_kit_uint32_t val)
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{
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try {
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pci_tree()->config_write(bus, dev, fun, pos, val, Pci::Device::ACCESS_32BIT);
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} catch (...) {
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if (verbose)
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PWRN("PCI device %02x:%02x.%x not found", bus, dev, fun);
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}
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}
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/***************************
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** Convenience functions **
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***************************/
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extern "C" int dde_kit_pci_first_device(int *bus, int *dev, int *fun)
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{
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try {
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pci_tree()->first_device(bus, dev, fun);
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return 0;
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} catch (...) {
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return -1;
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}
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}
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extern "C" int dde_kit_pci_next_device(int *bus, int *dev, int *fun)
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{
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try {
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pci_tree()->next_device(bus, dev, fun);
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return 0;
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} catch (...) {
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return -1;
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}
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}
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extern "C" dde_kit_addr_t dde_kit_pci_alloc_dma_buffer(int bus, int dev,
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int fun,
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dde_kit_size_t size)
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{
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try {
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using namespace Genode;
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Ram_dataspace_capability ram_cap;
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ram_cap = pci_tree()->alloc_dma_buffer(bus, dev, fun, size);
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addr_t base = (addr_t)env()->rm_session()->attach(ram_cap);
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/* add to DDE-kit page tables */
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addr_t phys = Dataspace_client(ram_cap).phys_addr();
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dde_kit_pgtab_set_region_with_size((void *)base, phys, size);
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return base;
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} catch (...) {
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return 0;
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}
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}
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/********************
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** Initialization **
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********************/
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extern "C" void dde_kit_pci_init(unsigned device_class, unsigned class_mask)
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{
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try {
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pci_tree(device_class, class_mask);
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} catch (...) {
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PERR("PCI initialization failed");
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}
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}
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