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genode/repos/os/src/drivers/platform/spec/x86/pci_session_component.h

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/*
* \brief platform session component
* \author Norman Feske
* \date 2008-01-28
*/
/*
* Copyright (C) 2008-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#pragma once
/* base */
#include <base/allocator_guard.h>
#include <base/rpc_server.h>
#include <base/tslab.h>
#include <cap_session/connection.h>
#include <ram_session/connection.h>
#include <root/component.h>
#include <root/client.h>
#include <util/retry.h>
#include <util/volatile_object.h>
/* os */
#include <io_mem_session/connection.h>
#include <os/session_policy.h>
#include <platform_session/platform_session.h>
/* local */
#include "pci_device_component.h"
#include "pci_config_access.h"
#include "pci_device_pd_ipc.h"
#include "device_pd.h"
namespace Platform {
bool bus_valid(int bus = 0);
unsigned short bridge_bdf(unsigned char bus);
class Rmrr;
class Root;
}
class Platform::Rmrr : public Genode::List<Platform::Rmrr>::Element
{
public:
class Bdf : public Genode::List<Bdf>::Element {
private:
Genode::uint8_t _bus, _dev, _func;
public:
Bdf(Genode::uint8_t bus, Genode::uint8_t dev,
Genode::uint8_t func)
: _bus(bus), _dev(dev), _func(func) { }
bool match(Genode::uint8_t bus, Genode::uint8_t dev,
Genode::uint8_t func) {
return bus == _bus && dev == _dev && func == _func; }
};
private:
Genode::uint64_t _start, _end;
Genode::Io_mem_dataspace_capability _cap;
Genode::List<Bdf> _bdf_list;
public:
Rmrr(Genode::uint64_t start, Genode::uint64_t end)
: _start(start), _end(end)
{ }
Genode::Io_mem_dataspace_capability match(Device_config config) {
Genode::uint8_t bus = config.bus_number();
Genode::uint8_t device = config.device_number();
Genode::uint8_t function = config.function_number();
for (Bdf *bdf = _bdf_list.first(); bdf; bdf = bdf->next()) {
if (!bdf->match(bus, device, function))
continue;
if (_cap.valid())
return _cap;
Genode::Io_mem_connection io_mem(_start, _end - _start + 1);
io_mem.on_destruction(Genode::Io_mem_connection::KEEP_OPEN);
_cap = io_mem.dataspace();
return _cap;
}
return Genode::Io_mem_dataspace_capability();
}
void add(Bdf * bdf) { _bdf_list.insert(bdf); }
static Genode::List<Rmrr> *list()
{
static Genode::List<Rmrr> _list;
return &_list;
}
};
namespace Platform {
class Session_component : public Genode::Rpc_object<Session>
{
private:
Genode::Rpc_entrypoint *_ep;
Genode::Allocator_guard _md_alloc;
Genode::Tslab<Device_component, 4096 - 64> _device_slab;
Genode::List<Device_component> _device_list;
Genode::Rpc_entrypoint &_device_pd_ep;
struct Resources {
Genode::Ram_connection _ram;
Resources() :
/* restrict physical address to 3G on 32bit */
_ram("dma", 0, (sizeof(void *) == 4)
? 0xc0000000UL : 0x100000000ULL)
{
/* associate _ram session with platform_drv _ram session */
_ram.ref_account(Genode::env()->ram_session_cap());
}
Genode::Ram_connection &ram() { return _ram; }
} _resources;
struct Devicepd {
Device_pd_policy *policy;
Device_pd_client child;
Genode::Allocator_guard &_md_alloc;
enum { DEVICE_PD_RAM_QUOTA = 180 * 4096 };
Devicepd (Genode::Rpc_entrypoint &ep,
Genode::Allocator_guard &md_alloc,
Genode::Ram_session_capability ram_ref_cap)
:
policy(nullptr),
child(Genode::reinterpret_cap_cast<Device_pd>(Genode::Native_capability())),
_md_alloc(md_alloc)
{
if (!md_alloc.withdraw(DEVICE_PD_RAM_QUOTA))
throw Out_of_metadata();
if (Genode::env()->ram_session()->transfer_quota(ram_ref_cap, DEVICE_PD_RAM_QUOTA)) {
PERR("Transferring quota for device pd failed");
md_alloc.upgrade(DEVICE_PD_RAM_QUOTA);
throw Platform::Session::Fatal();
}
try {
policy = new (md_alloc) Device_pd_policy(ep, ram_ref_cap, DEVICE_PD_RAM_QUOTA);
using Genode::Session_capability;
using Genode::Affinity;
Session_capability session = Genode::Root_client(policy->root()).session("", Affinity());
child = Device_pd_client(Genode::reinterpret_cap_cast<Device_pd>(session));
} catch (Genode::Rom_connection::Rom_connection_failed) {
PWRN("PCI device protection domain for IOMMU support "
"is not available");
if (policy) {
destroy(md_alloc, policy);
policy = nullptr;
}
md_alloc.upgrade(DEVICE_PD_RAM_QUOTA);
} catch (Genode::Allocator::Out_of_memory) {
md_alloc.upgrade(DEVICE_PD_RAM_QUOTA);
throw Out_of_metadata();
} catch(...) {
PERR("unknown exception");
md_alloc.upgrade(DEVICE_PD_RAM_QUOTA);
throw Platform::Session::Fatal();
}
}
~Devicepd() {
if (!policy)
return;
destroy(_md_alloc, policy);
_md_alloc.upgrade(DEVICE_PD_RAM_QUOTA);
}
bool valid() { return policy && policy->root().valid() && child.valid(); }
};
Genode::Lazy_volatile_object<struct Devicepd> _device_pd;
Genode::Session_label _label;
Genode::Session_policy _policy;
enum { MAX_PCI_DEVICES = Device_config::MAX_BUSES *
Device_config::MAX_DEVICES *
Device_config::MAX_FUNCTIONS };
static Genode::Bit_array<MAX_PCI_DEVICES> bdf_in_use;
/**
* Scan PCI buses for a device
*
* \param bus start scanning at bus number
* \param device start scanning at device number
* \param function start scanning at function number
* \param out_device_config device config information of the
* found device
* \param config_access interface for accessing the PCI
* configuration
* space
*
* \retval true device was found
* \retval false no device was found
*/
bool _find_next(int bus, int device, int function,
Device_config *out_device_config,
Config_access *config_access)
{
for (; bus < Device_config::MAX_BUSES; bus++) {
if (!bus_valid(bus))
continue;
for (; device < Device_config::MAX_DEVICES; device++) {
for (; function < Device_config::MAX_FUNCTIONS; function++) {
/* read config space */
Device_config config(bus, device, function, config_access);
if (config.valid()) {
*out_device_config = config;
return true;
}
}
function = 0; /* init value for next device */
}
device = 0; /* init value for next bus */
}
return false;
}
/**
* List containing extended PCI config space information
*/
static Genode::List<Config_space> &config_space_list() {
static Genode::List<Config_space> config_space;
return config_space;
}
/**
* Find for a given PCI device described by the bus:dev:func triple
* the corresponding extended 4K PCI config space address.
* A io mem dataspace is created and returned.
*/
Genode::addr_t
lookup_config_space(Genode::uint16_t const bdf)
{
using namespace Genode;
addr_t config_space = ~0UL; /* invalid */
Config_space *e = config_space_list().first();
for (; e && (config_space == ~0UL); e = e->next())
config_space = e->lookup_config_space(bdf);
return config_space;
}
/*
* List of aliases for PCI Class/Subclas/Prog I/F triple used
* by xml config for this platform driver
*/
unsigned class_subclass_prog(const char * name) {
using namespace Genode;
static struct {
const char * alias;
uint8_t pci_class, pci_subclass, pci_progif;
} const aliases [] = {
{ "AHCI" , 0x1, 0x06, 0x0},
{ "ALL" , 0x0, 0x00, 0x0},
{ "AUDIO" , 0x4, 0x01, 0x0},
{ "ETHERNET" , 0x2, 0x00, 0x0},
{ "HDAUDIO" , 0x4, 0x03, 0x0},
{ "USB" , 0xc, 0x03, 0x0},
{ "VGA" , 0x3, 0x00, 0x0},
{ "WIFI" , 0x2, 0x80, 0x0},
{ "ISABRIDGE", 0x6, 0x01, 0x0}
};
for (unsigned i = 0; i < sizeof(aliases) / sizeof(aliases[0]); i++) {
if (strcmp(aliases[i].alias, name))
continue;
return 0U | aliases[i].pci_class << 16 |
aliases[i].pci_subclass << 8 |
aliases[i].pci_progif;
}
return ~0U;
}
/**
* Check device usage according to session policy
*/
bool permit_device(const char * name)
{
using namespace Genode;
try {
_policy.for_each_sub_node("device", [&] (Xml_node dev) {
try {
/* enforce restriction based on name name */
char policy_name[8];
dev.attribute("name").value(policy_name,
sizeof(policy_name));
if (!strcmp(policy_name, name))
/* found identical match - permit access */
throw true;
} catch (Xml_attribute::Nonexistent_attribute) { }
});
} catch (bool result) { return result; }
return false;
}
/**
* Check according session policy device usage
*/
bool permit_device(Genode::uint8_t b, Genode::uint8_t d,
Genode::uint8_t f, unsigned class_code)
{
using namespace Genode;
try {
_policy.for_each_sub_node("pci", [&] (Xml_node node) {
try {
unsigned bus, device, function;
node.attribute("bus").value(&bus);
node.attribute("device").value(&device);
node.attribute("function").value(&function);
if (b == bus && d == device && f == function)
throw true;
return;
} catch (Xml_attribute::Nonexistent_attribute) { }
/* enforce restriction based upon classes */
unsigned class_sub_prog = 0;
try {
char alias_class[32];
node.attribute("class").value(alias_class,
sizeof(alias_class));
class_sub_prog = class_subclass_prog(alias_class);
} catch (Xml_attribute::Nonexistent_attribute) {
return;
}
enum { DONT_CHECK_PROGIF = 8 };
/* if class/subclass don't match - deny */
if (class_sub_prog && (class_sub_prog ^ class_code) >> DONT_CHECK_PROGIF)
return;
/* if this bdf is used by some policy - deny */
if (find_dev_in_policy(b, d, f))
return;
throw true;
});
} catch (bool result) { return result; }
return false;
}
/**
* Lookup a given device name.
*/
bool find_dev_in_policy(const char * dev_name, bool once = true)
{
using namespace Genode;
try {
config()->xml_node().for_each_sub_node("policy", [&] (Xml_node policy) {
policy.for_each_sub_node("device", [&] (Xml_node device) {
try {
/* device attribute from policy node */
char policy_device[8];
device.attribute("name").value(policy_device, sizeof(policy_device));
if (!strcmp(policy_device, dev_name)) {
if (once)
throw true;
once = true;
}
} catch (Xml_node::Nonexistent_attribute) { }
});
});
} catch (bool result) { return result; }
return false;
}
/**
* Lookup a given device name.
*/
bool find_dev_in_policy(Genode::uint8_t b, Genode::uint8_t d,
Genode::uint8_t f, bool once = true)
{
using namespace Genode;
try {
Xml_node xml(config()->xml_node());
xml.for_each_sub_node("policy", [&] (Xml_node policy) {
policy.for_each_sub_node("pci", [&] (Xml_node node) {
try {
unsigned bus, device, function;
node.attribute("bus").value(&bus);
node.attribute("device").value(&device);
node.attribute("function").value(&function);
if (b == bus && d == device && f == function) {
if (once)
throw true;
once = true;
}
} catch (Xml_node::Nonexistent_attribute) { }
});
});
} catch (bool result) { return result; }
return false;
}
public:
/**
* Constructor
*/
Session_component(Genode::Rpc_entrypoint *ep,
Genode::Allocator *md_alloc,
const char *args,
Genode::Rpc_entrypoint &device_pd_ep)
:
_ep(ep),
_md_alloc(md_alloc, Genode::Arg_string::find_arg(args, "ram_quota").long_value(0)),
_device_slab(&_md_alloc),
_device_pd_ep(device_pd_ep),
_label(args), _policy(_label)
{
/* non-pci devices */
_policy.for_each_sub_node("device", [&] (Genode::Xml_node device_node) {
try {
char policy_device[8];
device_node.attribute("name").value(policy_device,
sizeof(policy_device));
enum { DOUBLET = false };
if (!find_dev_in_policy(policy_device, DOUBLET))
return;
PERR("'%s' - device '%s' is part of more than one policy",
_label.string(), policy_device);
} catch (Genode::Xml_node::Nonexistent_attribute) {
PERR("'%s' - device node misses a 'name' attribute",
_label.string());
}
throw Genode::Root::Unavailable();
});
/* pci devices */
_policy.for_each_sub_node("pci", [&] (Genode::Xml_node node) {
enum { INVALID_CLASS = 0x1000000U };
unsigned class_sub_prog = INVALID_CLASS;
using Genode::Xml_attribute;
/**
* Valid input is either a triple of 'bus', 'device',
* 'function' attributes or a single 'class' attribute.
* All other attribute names are traded as wrong.
*/
try {
char alias_class[32];
node.attribute("class").value(alias_class,
sizeof(alias_class));
class_sub_prog = class_subclass_prog(alias_class);
if (class_sub_prog >= INVALID_CLASS) {
PERR("'%s' - invalid 'class' attribute '%s'",
_label.string(), alias_class);
throw Genode::Root::Unavailable();
}
} catch (Xml_attribute::Nonexistent_attribute) { }
/* if we read a class attribute all is fine */
if (class_sub_prog < INVALID_CLASS) {
/* sanity check that 'class' is the only attribute */
try {
node.attribute(1);
PERR("'%s' - attributes beside 'class' detected",
_label.string());
throw Genode::Root::Unavailable();
} catch (Xml_attribute::Nonexistent_attribute) { }
/* we have a class and it is the only attribute */
return;
}
/* no 'class' attribute - now check for valid bdf triple */
try {
node.attribute(3);
PERR("'%s' - invalid number of pci node attributes",
_label.string());
throw Genode::Root::Unavailable();
} catch (Xml_attribute::Nonexistent_attribute) { }
try {
unsigned bus, device, function;
node.attribute("bus").value(&bus);
node.attribute("device").value(&device);
node.attribute("function").value(&function);
if ((bus >= Device_config::MAX_BUSES) ||
(device >= Device_config::MAX_DEVICES) ||
(function >= Device_config::MAX_FUNCTIONS))
throw Xml_attribute::Nonexistent_attribute();
enum { DOUBLET = false };
if (!find_dev_in_policy(bus, device, function, DOUBLET))
return;
PERR("'%s' - device '%2x:%2x.%x' is part of more than "
"one policy", _label.string(), bus, device,
function);
} catch (Xml_attribute::Nonexistent_attribute) {
PERR("'%s' - invalid pci node attributes for bdf",
_label.string());
}
throw Genode::Root::Unavailable();
});
}
/**
* Destructor
*/
~Session_component()
{
/* release all elements of the session's device list */
while (_device_list.first())
release_device(_device_list.first()->cap());
}
void upgrade_ram_quota(long quota) { _md_alloc.upgrade(quota); }
static void add_config_space(Genode::uint32_t bdf_start,
Genode::uint32_t func_count,
Genode::addr_t base)
{
using namespace Genode;
Config_space * space =
new (env()->heap()) Config_space(bdf_start, func_count,
base);
config_space_list().insert(space);
}
/**
* Check whether msi usage was explicitly switched off
*/
bool msi_usage()
{
try {
char mode[8];
_policy.attribute("irq_mode").value(mode, sizeof(mode));
if (!Genode::strcmp("nomsi", mode))
return false;
} catch (Genode::Xml_node::Nonexistent_attribute) { }
return true;
}
/***************************
** PCI session interface **
***************************/
Device_capability first_device(unsigned device_class,
unsigned class_mask) {
return next_device(Device_capability(), device_class, class_mask); }
Device_capability next_device(Device_capability prev_device,
unsigned device_class,
unsigned class_mask)
{
/*
* Create the interface to the PCI config space.
* This involves the creation of I/O port sessions.
*/
Config_access config_access;
/* lookup device component for previous device */
auto lambda = [&] (Device_component *prev)
{
/*
* Start bus scanning after the previous device's location.
* If no valid device was specified for 'prev_device',
* start at the beginning.
*/
int bus = 0, device = 0, function = -1;
if (prev) {
Device_config config = prev->config();
bus = config.bus_number();
device = config.device_number();
function = config.function_number();
}
/*
* Scan buses for devices.
* If no device is found, return an invalid capability.
*/
Device_config config;
while (true) {
function += 1;
if (!_find_next(bus, device, function, &config,
&config_access))
return Device_capability();
/* get new bdf values */
bus = config.bus_number();
device = config.device_number();
function = config.function_number();
/* if filter of driver don't match skip and continue */
if ((config.class_code() ^ device_class) & class_mask)
continue;
/* check that policy permit access to the matched device */
if (permit_device(bus, device, function,
config.class_code()))
break;
}
/* lookup if we have a extended pci config space */
Genode::addr_t config_space =
lookup_config_space(config.bdf());
/*
* A device was found. Create a new device component for the
* device and return its capability.
*/
try {
Device_component * dev = new (_device_slab)
Device_component(config, config_space, _ep, this,
&_md_alloc);
/* if more than one driver uses the device - warn about */
if (bdf_in_use.get(Device_config::MAX_BUSES * bus +
Device_config::MAX_DEVICES * device +
function, 1))
PERR("Device %2x:%2x.%u is used by more than one "
"driver - session '%s'.", bus, device, function,
_label.string());
else
bdf_in_use.set(Device_config::MAX_BUSES * bus +
Device_config::MAX_DEVICES * device +
function, 1);
_device_list.insert(dev);
return _ep->manage(dev);
} catch (Genode::Allocator::Out_of_memory) {
throw Out_of_metadata();
}
};
return _ep->apply(prev_device, lambda);
}
void release_device(Device_capability device_cap)
{
Device_component * device;
auto lambda = [&] (Device_component *d)
{
device = d;
if (!device)
return;
unsigned const bus = device->config().bus_number();
unsigned const dev = device->config().device_number();
unsigned const func = device->config().function_number();
if (bdf_in_use.get(Device_config::MAX_BUSES * bus +
Device_config::MAX_DEVICES * dev +
func, 1))
bdf_in_use.clear(Device_config::MAX_BUSES * bus +
Device_config::MAX_DEVICES * dev + func, 1);
_device_list.remove(device);
_ep->dissolve(device);
};
/* lookup device component for previous device */
_ep->apply(device_cap, lambda);
if (!device) return;
if (device->config().valid())
destroy(_device_slab, device);
else
destroy(_md_alloc, device);
}
void assign_device(Device_component * device)
{
using namespace Genode;
if (!device || !device->get_config_space().valid())
return;
Io_mem_dataspace_capability io_mem = device->get_config_space();
if (!_device_pd.is_constructed())
_device_pd.construct(_device_pd_ep, _md_alloc,
_resources.ram().cap());
if (!_device_pd->valid())
return;
try {
_device_pd->child.assign_pci(io_mem, device->config().bdf());
for (Rmrr *r = Rmrr::list()->first(); r; r = r->next()) {
Io_mem_dataspace_capability rmrr_cap = r->match(device->config());
if (rmrr_cap.valid())
_device_pd->child.attach_dma_mem(rmrr_cap);
}
} catch (...) {
PERR("assignment to device pd or of RMRR region failed");
}
}
/**
* De-/Allocation of dma capable dataspaces
*/
typedef Genode::Ram_dataspace_capability Ram_capability;
Ram_capability alloc_dma_buffer(Genode::size_t const size)
{
if (!_device_pd.is_constructed())
_device_pd.construct(_device_pd_ep, _md_alloc,
_resources.ram().cap());
if (!_md_alloc.withdraw(size))
throw Out_of_metadata();
/* transfer ram quota to session specific ram session */
Genode::Ram_session * const rs = Genode::env()->ram_session();
if (rs->transfer_quota(_resources.ram().cap(), size)) {
_md_alloc.upgrade(size);
throw Fatal();
}
enum { UPGRADE_QUOTA = 4096 };
/* allocate dataspace from session specific ram session */
Ram_capability ram_cap = Genode::retry<Genode::Ram_session::Out_of_metadata>(
[&] () { return _resources.ram().alloc(size, Genode::UNCACHED); },
[&] () {
if (!_md_alloc.withdraw(UPGRADE_QUOTA)) {
/* role-back */
if (_resources.ram().transfer_quota(Genode::env()->ram_session_cap(), size))
throw Fatal();
_md_alloc.upgrade(size);
throw Out_of_metadata();
}
char buf[32];
Genode::snprintf(buf, sizeof(buf), "ram_quota=%u",
UPGRADE_QUOTA);
Genode::env()->parent()->upgrade(_resources.ram().cap(), buf);
});
if (!_device_pd->valid())
return ram_cap;
Genode::retry<Genode::Rm_session::Out_of_metadata>(
[&] () { _device_pd->child.attach_dma_mem(ram_cap); },
[&] () {
if (!_md_alloc.withdraw(UPGRADE_QUOTA)) {
/* role-back */
_resources.ram().free(ram_cap);
if (_resources.ram().transfer_quota(Genode::env()->ram_session_cap(), size))
throw Fatal();
_md_alloc.upgrade(size);
throw Out_of_metadata();
}
if (rs->transfer_quota(_resources.ram().cap(), UPGRADE_QUOTA))
throw Fatal();
Genode::Ram_connection &slave = _device_pd->policy->ram_slave();
if (_resources.ram().transfer_quota(slave.cap(), UPGRADE_QUOTA))
throw Fatal();
});
return ram_cap;
}
void free_dma_buffer(Ram_capability ram)
{
if (ram.valid())
_resources.ram().free(ram);
}
Device_capability device(String const &name) override;
};
}
class Platform::Root : public Genode::Root_component<Session_component>
{
private:
Genode::Rpc_entrypoint _device_pd_ep;
void _parse_report_rom(const char * acpi_rom)
{
using namespace Genode;
Config_access config_access;
Xml_node xml_acpi(acpi_rom);
if (!xml_acpi.has_type("acpi"))
throw 1;
for (unsigned i = 0; i < xml_acpi.num_sub_nodes(); i++) {
Xml_node node = xml_acpi.sub_node(i);
if (node.has_type("bdf")) {
uint32_t bdf_start = 0;
uint32_t func_count = 0;
addr_t base = 0;
node.attribute("start").value(&bdf_start);
node.attribute("count").value(&func_count);
node.attribute("base").value(&base);
Session_component::add_config_space(bdf_start, func_count,
base);
}
if (node.has_type("irq_override")) {
unsigned irq = 0xff;
unsigned gsi = 0xff;
unsigned flags = 0xff;
node.attribute("irq").value(&irq);
node.attribute("gsi").value(&gsi);
node.attribute("flags").value(&flags);
using Platform::Irq_override;
Irq_override * o = new (env()->heap()) Irq_override(irq,
gsi,
flags);
Irq_override::list()->insert(o);
}
if (node.has_type("rmrr")) {
uint64_t mem_start, mem_end;
node.attribute("start").value(&mem_start);
node.attribute("end").value(&mem_end);
if (node.num_sub_nodes() == 0)
throw 2;
Rmrr * rmrr = new (env()->heap()) Rmrr(mem_start, mem_end);
Rmrr::list()->insert(rmrr);
for (unsigned s = 0; s < node.num_sub_nodes(); s++) {
Xml_node scope = node.sub_node(s);
if (!scope.num_sub_nodes() || !scope.has_type("scope"))
throw 3;
unsigned bus, dev, func;
scope.attribute("bus_start").value(&bus);
for (unsigned p = 0; p < scope.num_sub_nodes(); p++) {
Xml_node path = scope.sub_node(p);
if (!path.has_type("path"))
throw 4;
path.attribute("dev").value(&dev);
path.attribute("func").value(&func);
Device_config bridge(bus, dev, func,
&config_access);
if (bridge.is_pci_bridge())
/* PCI bridge spec 3.2.5.3, 3.2.5.4 */
bus = bridge.read(&config_access, 0x19,
Device::ACCESS_8BIT);
}
rmrr->add(new (env()->heap()) Rmrr::Bdf(bus, dev,
func));
}
}
if (!node.has_type("routing"))
continue;
unsigned gsi;
unsigned bridge_bdf;
unsigned device;
unsigned device_pin;
node.attribute("gsi").value(&gsi);
node.attribute("bridge_bdf").value(&bridge_bdf);
node.attribute("device").value(&device);
node.attribute("device_pin").value(&device_pin);
/* check that bridge bdf is actually a valid device */
Device_config config((bridge_bdf >> 8 & 0xff),
(bridge_bdf >> 3) & 0x1f,
bridge_bdf & 0x7, &config_access);
if (!config.valid())
continue;
if (!config.is_pci_bridge() && bridge_bdf != 0)
/**
* If the bridge bdf has not a type header of a bridge in
* the pci config space, then it should be the host bridge
* device. The host bridge device need not to be
* necessarily at 0:0.0, it may be on another location. The
* irq routing information for the host bridge however
* contain entries for the bridge bdf to be 0:0.0 -
* therefore we override it here for the irq rerouting
* information of host bridge devices.
*/
bridge_bdf = 0;
Irq_routing * r = new (env()->heap()) Irq_routing(gsi,
bridge_bdf,
device,
device_pin);
Irq_routing::list()->insert(r);
}
}
protected:
Session_component *_create_session(const char *args)
{
try {
return new (md_alloc()) Session_component(ep(), md_alloc(),
args, _device_pd_ep);
} catch (Genode::Session_policy::No_policy_defined) {
PERR("Invalid session request, no matching policy for '%s'",
Genode::Session_label(args).string());
throw Genode::Root::Unavailable();
}
}
void _upgrade_session(Session_component *s, const char *args) override
{
long ram_quota = Genode::Arg_string::find_arg(args, "ram_quota").long_value(0);
s->upgrade_ram_quota(ram_quota);
}
public:
/**
* Constructor
*
* \param ep entry point to be used for serving the PCI session
* and PCI device interface
* \param md_alloc meta-data allocator for allocating PCI-session
* components and PCI-device components
*/
Root(Genode::Rpc_entrypoint *ep, Genode::Allocator *md_alloc,
const char *acpi_rom, Genode::Cap_connection &cap)
:
Genode::Root_component<Session_component>(ep, md_alloc),
_device_pd_ep(&cap, STACK_SIZE, "device_pd_slave")
{
/* enforce initial bus scan */
bus_valid();
if (acpi_rom) {
try {
_parse_report_rom(acpi_rom);
} catch (...) {
PERR("PCI config space data could not be parsed.");
}
}
}
};
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