/*
* \brief Protection domain (PD) session interface
* \author Christian Helmuth
* \author Norman Feske
* \date 2006-06-27
*/
/*
* Copyright (C) 2006-2017 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.
*/
#ifndef _INCLUDE__PD_SESSION__PD_SESSION_H_
#define _INCLUDE__PD_SESSION__PD_SESSION_H_
#include
#include
#include
#include
#include
namespace Genode {
struct Pd_session;
struct Pd_session_client;
struct Parent;
struct Signal_context;
}
struct Genode::Pd_session : Session, Ram_allocator
{
/**
* \noapi
*/
static const char *service_name() { return "PD"; }
/*
* A PD session consumes a dataspace capability for the session-object
* allocation, a capability for the 'Native_pd' RPC interface, its
* session capability, and the RPC capabilities for the 3 contained
* region maps.
*
* Furthermore, we account for the dataspace capabilities allocated during
* the component bootstrapping.
*/
enum { CAP_QUOTA = 6 + 7 };
typedef Pd_session_client Client;
virtual ~Pd_session() { }
/**
* Assign parent to protection domain
*
* \param parent capability of parent interface
*/
virtual void assign_parent(Capability parent) = 0;
/**
* Assign PCI device to PD
*
* The specified address has to refer to the locally mapped PCI
* configuration space of the device.
*
* This function is solely used on the NOVA kernel.
*/
virtual bool assign_pci(addr_t pci_config_memory_address, uint16_t bdf) = 0;
/********************************
** Support for the signal API **
********************************/
typedef Capability Signal_source_capability;
class Invalid_session : public Exception { };
class Undefined_ref_account : public Exception { };
class Invalid_signal_source : public Exception { };
/**
* Create a new signal source
*
* \return a cap that acts as reference to the created source
*
* The signal source provides an interface to wait for incoming signals.
*
* \throw Out_of_ram
* \throw Out_of_caps
*/
virtual Signal_source_capability alloc_signal_source() = 0;
/**
* Free a signal source
*
* \param cap capability of the signal source to destroy
*/
virtual void free_signal_source(Signal_source_capability cap) = 0;
/**
* Allocate signal context
*
* \param source signal source that shall provide the new context
*
*
* \param imprint opaque value that gets delivered with signals
* originating from the allocated signal-context capability
* \return new signal-context capability
*
* \throw Out_of_ram
* \throw Out_of_caps
* \throw Invalid_signal_source
*/
virtual Capability
alloc_context(Signal_source_capability source, unsigned long imprint) = 0;
/**
* Free signal-context
*
* \param cap capability of signal-context to release
*/
virtual void free_context(Capability cap) = 0;
/**
* Submit signals to the specified signal context
*
* \param context signal destination
* \param cnt number of signals to submit at once
*
* The 'context' argument does not necessarily belong to this PD session.
* Normally, it is a capability obtained from a potentially untrusted
* component. Because we cannot trust this capability, signals are not
* submitted by invoking 'cap' directly but by using it as argument to our
* trusted PD-session interface. Otherwise, a potential signal receiver
* could supply a capability with a blocking interface to compromise the
* nonblocking behaviour of the signal submission.
*/
virtual void submit(Capability context, unsigned cnt = 1) = 0;
/***********************************
** Support for the RPC framework **
***********************************/
/**
* Allocate new RPC-object capability
*
* \param ep entry point that will use this capability
*
* \throw Out_of_ram if meta-data backing store is exhausted
* \throw Out_of_caps if 'cap_quota' is exceeded
*
* \return new RPC capability
*/
virtual Native_capability alloc_rpc_cap(Native_capability ep) = 0;
/**
* Free RPC-object capability
*
* \param cap capability to free
*/
virtual void free_rpc_cap(Native_capability cap) = 0;
/**************************************
** Virtual address-space management **
**************************************/
enum { LINKER_AREA_SIZE = 160*1024*1024UL };
/**
* Return region map of the PD's virtual address space
*/
virtual Capability address_space() = 0;
/**
* Return region map of the PD's stack area
*/
virtual Capability stack_area() = 0;
/**
* Return region map of the PD's linker area
*/
virtual Capability linker_area() = 0;
/*******************************************
** Accounting for capability allocations **
*******************************************/
/**
* Define reference account for the PD session
*
* \throw Invalid_session
*/
virtual void ref_account(Capability) = 0;
/**
* Transfer capability quota to another PD session
*
* \param to receiver of quota donation
* \param amount amount of quota to donate
*
* \throw Out_of_caps
* \throw Invalid_session
* \throw Undefined_ref_account
*
* Quota can only be transfered if the specified PD session is either the
* reference account for this session or vice versa.
*/
virtual void transfer_quota(Capability to, Cap_quota amount) = 0;
/**
* Return current capability-quota limit
*/
virtual Cap_quota cap_quota() const = 0;
/**
* Return number of capabilities allocated from the session
*/
virtual Cap_quota used_caps() const = 0;
/**
* Return amount of available capabilities
*/
Cap_quota avail_caps() const
{
return Cap_quota { cap_quota().value - used_caps().value };
}
/***********************************
** RAM allocation and accounting **
***********************************/
/*
* Note that the 'Pd_session' inherits the 'Ram_allocator' interface,
* which comprises the actual allocation and deallocation operations.
*/
/**
* Transfer quota to another RAM session
*
* \param to receiver of quota donation
* \param amount amount of quota to donate
*
* \throw Out_of_ram
* \throw Invalid_session
* \throw Undefined_ref_account
*
* Quota can only be transfered if the specified PD session is either the
* reference account for this session or vice versa.
*/
virtual void transfer_quota(Capability to, Ram_quota amount) = 0;
/**
* Return current quota limit
*/
virtual Ram_quota ram_quota() const = 0;
/**
* Return used quota
*/
virtual Ram_quota used_ram() const = 0;
/**
* Return amount of available quota
*/
Ram_quota avail_ram() const { return { ram_quota().value - used_ram().value }; }
/*****************************************
** Access to kernel-specific interface **
*****************************************/
/**
* Common base class of kernel-specific PD interfaces
*/
struct Native_pd { };
/**
* Return capability to kernel-specific PD operations
*/
virtual Capability native_pd() = 0;
/*********************
** RPC declaration **
*********************/
GENODE_RPC(Rpc_assign_parent, void, assign_parent, Capability);
GENODE_RPC(Rpc_assign_pci, bool, assign_pci, addr_t, uint16_t);
GENODE_RPC_THROW(Rpc_alloc_signal_source, Signal_source_capability,
alloc_signal_source,
GENODE_TYPE_LIST(Out_of_ram, Out_of_caps));
GENODE_RPC(Rpc_free_signal_source, void, free_signal_source, Signal_source_capability);
GENODE_RPC_THROW(Rpc_alloc_context, Capability, alloc_context,
GENODE_TYPE_LIST(Out_of_ram, Out_of_caps, Invalid_signal_source),
Signal_source_capability, unsigned long);
GENODE_RPC(Rpc_free_context, void, free_context,
Capability);
GENODE_RPC(Rpc_submit, void, submit, Capability, unsigned);
GENODE_RPC_THROW(Rpc_alloc_rpc_cap, Native_capability, alloc_rpc_cap,
GENODE_TYPE_LIST(Out_of_ram, Out_of_caps), Native_capability);
GENODE_RPC(Rpc_free_rpc_cap, void, free_rpc_cap, Native_capability);
GENODE_RPC(Rpc_address_space, Capability, address_space);
GENODE_RPC(Rpc_stack_area, Capability, stack_area);
GENODE_RPC(Rpc_linker_area, Capability, linker_area);
GENODE_RPC_THROW(Rpc_ref_account, void, ref_account,
GENODE_TYPE_LIST(Invalid_session), Capability);
GENODE_RPC_THROW(Rpc_transfer_cap_quota, void, transfer_quota,
GENODE_TYPE_LIST(Out_of_caps, Invalid_session, Undefined_ref_account),
Capability, Cap_quota);
GENODE_RPC(Rpc_cap_quota, Cap_quota, cap_quota);
GENODE_RPC(Rpc_used_caps, Cap_quota, used_caps);
GENODE_RPC_THROW(Rpc_alloc, Ram_dataspace_capability, alloc,
GENODE_TYPE_LIST(Out_of_ram, Out_of_caps, Undefined_ref_account),
size_t, Cache_attribute);
GENODE_RPC(Rpc_free, void, free, Ram_dataspace_capability);
GENODE_RPC_THROW(Rpc_transfer_ram_quota, void, transfer_quota,
GENODE_TYPE_LIST(Out_of_ram, Invalid_session, Undefined_ref_account),
Capability, Ram_quota);
GENODE_RPC(Rpc_ram_quota, Ram_quota, ram_quota);
GENODE_RPC(Rpc_used_ram, Ram_quota, used_ram);
GENODE_RPC(Rpc_native_pd, Capability, native_pd);
GENODE_RPC_INTERFACE(Rpc_assign_parent, Rpc_assign_pci,
Rpc_alloc_signal_source, Rpc_free_signal_source,
Rpc_alloc_context, Rpc_free_context, Rpc_submit,
Rpc_alloc_rpc_cap, Rpc_free_rpc_cap, Rpc_address_space,
Rpc_stack_area, Rpc_linker_area, Rpc_ref_account,
Rpc_transfer_cap_quota, Rpc_cap_quota, Rpc_used_caps,
Rpc_alloc, Rpc_free,
Rpc_transfer_ram_quota, Rpc_ram_quota, Rpc_used_ram,
Rpc_native_pd);
};
#endif /* _INCLUDE__PD_SESSION__PD_SESSION_H_ */