b37f411c3f
Issue #2417
217 lines
5.4 KiB
C++
217 lines
5.4 KiB
C++
/**
|
|
* \brief Block driver session creation
|
|
* \author Sebastian Sumpf
|
|
* \date 2015-09-29
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2016-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
/* Genode includes */
|
|
#include <base/attached_rom_dataspace.h>
|
|
#include <base/component.h>
|
|
#include <base/heap.h>
|
|
#include <base/log.h>
|
|
#include <block/component.h>
|
|
#include <os/session_policy.h>
|
|
#include <util/xml_node.h>
|
|
#include <os/reporter.h>
|
|
|
|
/* local includes */
|
|
#include <ahci.h>
|
|
|
|
|
|
namespace Block {
|
|
class Factory;
|
|
class Root_multiple_clients;
|
|
class Main;
|
|
}
|
|
|
|
|
|
struct Block::Factory : Driver_factory
|
|
{
|
|
long device_num;
|
|
|
|
Block::Driver *create()
|
|
{
|
|
return Ahci_driver::claim_port(device_num);
|
|
}
|
|
|
|
void destroy(Block::Driver *driver)
|
|
{
|
|
Ahci_driver::free_port(device_num);
|
|
}
|
|
|
|
Factory(long device_num) : device_num(device_num) { }
|
|
};
|
|
|
|
|
|
class Session_component : public Block::Session_component
|
|
{
|
|
public:
|
|
|
|
Session_component(Block::Driver_factory &driver_factory,
|
|
Genode::Entrypoint &ep,
|
|
Genode::Region_map &rm,
|
|
Genode::size_t buf_size)
|
|
: Block::Session_component(driver_factory, ep, rm, buf_size) { }
|
|
|
|
Block::Driver_factory &factory() { return _driver_factory; }
|
|
};
|
|
|
|
|
|
class Block::Root_multiple_clients : public Root_component< ::Session_component>,
|
|
public Ahci_root
|
|
{
|
|
private:
|
|
|
|
Genode::Env &_env;
|
|
Genode::Allocator &_alloc;
|
|
Genode::Xml_node _config;
|
|
|
|
long _device_num(Session_label const &label, char *model, char *sn, size_t bufs_len)
|
|
{
|
|
long num = -1;
|
|
|
|
try {
|
|
Session_policy policy(label, _config);
|
|
|
|
/* try read device port number attribute */
|
|
try { policy.attribute("device").value(&num); }
|
|
catch (...) { }
|
|
|
|
/* try read device model and serial number attributes */
|
|
model[0] = sn[0] = 0;
|
|
policy.attribute("model").value(model, bufs_len);
|
|
policy.attribute("serial").value(sn, bufs_len);
|
|
|
|
} catch (...) { }
|
|
|
|
return num;
|
|
}
|
|
|
|
protected:
|
|
|
|
::Session_component *_create_session(const char *args)
|
|
{
|
|
Session_label const label = label_from_args(args);
|
|
|
|
size_t ram_quota =
|
|
Arg_string::find_arg(args, "ram_quota").ulong_value(0);
|
|
size_t tx_buf_size =
|
|
Arg_string::find_arg(args, "tx_buf_size").ulong_value(0);
|
|
|
|
if (!tx_buf_size)
|
|
throw Service_denied();
|
|
|
|
size_t session_size = sizeof(::Session_component)
|
|
+ sizeof(Factory) + tx_buf_size;
|
|
|
|
if (max((size_t)4096, session_size) > ram_quota) {
|
|
error("insufficient 'ram_quota' from '", label, "',"
|
|
" got ", ram_quota, ", need ", session_size);
|
|
throw Insufficient_ram_quota();
|
|
}
|
|
|
|
/* Search for configured device */
|
|
char model_buf[64], sn_buf[64];
|
|
|
|
long num = _device_num(label, model_buf, sn_buf, sizeof(model_buf));
|
|
/* prefer model/serial routing */
|
|
if ((model_buf[0] != 0) && (sn_buf[0] != 0))
|
|
num = Ahci_driver::device_number(model_buf, sn_buf);
|
|
|
|
if (num < 0) {
|
|
error("rejecting session request, no matching policy for '", label, "'",
|
|
model_buf[0] == 0 ? ""
|
|
: " (model=", Cstring(model_buf), " serial=", Cstring(sn_buf), ")");
|
|
throw Service_denied();
|
|
}
|
|
|
|
if (!Ahci_driver::avail(num)) {
|
|
error("Device ", num, " not available");
|
|
throw Service_denied();
|
|
}
|
|
|
|
Block::Factory *factory = new (&_alloc) Block::Factory(num);
|
|
::Session_component *session = new (&_alloc)
|
|
::Session_component(*factory, _env.ep(), _env.rm(), tx_buf_size);
|
|
log("session opened at device ", num, " for '", label, "'");
|
|
return session;
|
|
}
|
|
|
|
void _destroy_session(::Session_component *session)
|
|
{
|
|
Driver_factory &factory = session->factory();
|
|
Genode::destroy(&_alloc, session);
|
|
Genode::destroy(&_alloc, &factory);
|
|
}
|
|
|
|
public:
|
|
|
|
Root_multiple_clients(Genode::Env &env, Genode::Allocator &alloc,
|
|
Genode::Xml_node config)
|
|
:
|
|
Root_component(&env.ep().rpc_ep(), &alloc),
|
|
_env(env), _alloc(alloc), _config(config)
|
|
{ }
|
|
|
|
Genode::Entrypoint &entrypoint() override { return _env.ep(); }
|
|
|
|
void announce() override
|
|
{
|
|
_env.parent().announce(_env.ep().manage(*this));
|
|
}
|
|
};
|
|
|
|
|
|
struct Block::Main
|
|
{
|
|
Genode::Env &env;
|
|
Genode::Heap heap { env.ram(), env.rm() };
|
|
|
|
Genode::Attached_rom_dataspace config { env, "config" };
|
|
|
|
Genode::Constructible<Genode::Reporter> reporter;
|
|
|
|
Block::Root_multiple_clients root;
|
|
|
|
Signal_handler<Main> device_identified {
|
|
env.ep(), *this, &Main::handle_device_identified };
|
|
|
|
Main(Genode::Env &env)
|
|
: env(env), root(env, heap, config.xml())
|
|
{
|
|
Genode::log("--- Starting AHCI driver ---");
|
|
bool support_atapi = config.xml().attribute_value("atapi", false);
|
|
try {
|
|
Ahci_driver::init(env, heap, root, support_atapi, device_identified);
|
|
} catch (Ahci_driver::Missing_controller) {
|
|
Genode::error("no AHCI controller found");
|
|
env.parent().exit(~0);
|
|
} catch (Genode::Service_denied) {
|
|
Genode::error("hardware access denied");
|
|
env.parent().exit(~0);
|
|
}
|
|
}
|
|
|
|
void handle_device_identified()
|
|
{
|
|
try {
|
|
Xml_node report = config.xml().sub_node("report");
|
|
if (report.attribute_value("ports", false)) {
|
|
reporter.construct(env, "ports");
|
|
reporter->enabled(true);
|
|
Ahci_driver::report_ports(*reporter);
|
|
}
|
|
} catch (Genode::Xml_node::Nonexistent_sub_node) { }
|
|
}
|
|
};
|
|
|
|
|
|
void Component::construct(Genode::Env &env) { static Block::Main server(env); }
|