genode/repos/base/include/pd_session/client.h

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2011-12-22 16:19:25 +01:00
/*
* \brief Client-side pd session interface
* \author Christian Helmuth
* \date 2006-07-12
*/
/*
* Copyright (C) 2006-2017 Genode Labs GmbH
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*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
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*/
#ifndef _INCLUDE__PD_SESSION__CLIENT_H_
#define _INCLUDE__PD_SESSION__CLIENT_H_
#include <pd_session/capability.h>
#include <dataspace/client.h>
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namespace Genode { struct Pd_session_client; }
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struct Genode::Pd_session_client : Rpc_client<Pd_session>
{
explicit Pd_session_client(Pd_session_capability session)
: Rpc_client<Pd_session>(session) { }
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void assign_parent(Capability<Parent> parent) override {
call<Rpc_assign_parent>(parent); }
bool assign_pci(addr_t pci_config_memory_address, uint16_t bdf) override {
return call<Rpc_assign_pci>(pci_config_memory_address, bdf); }
void map(addr_t virt, addr_t size) override { call<Rpc_map>(virt, size); }
Signal_source_capability alloc_signal_source() override {
return call<Rpc_alloc_signal_source>(); }
void free_signal_source(Signal_source_capability cap) override {
call<Rpc_free_signal_source>(cap); }
Signal_context_capability alloc_context(Signal_source_capability source,
unsigned long imprint) override {
return call<Rpc_alloc_context>(source, imprint); }
void free_context(Signal_context_capability cap) override {
call<Rpc_free_context>(cap); }
void submit(Signal_context_capability receiver, unsigned cnt = 1) override {
call<Rpc_submit>(receiver, cnt); }
Native_capability alloc_rpc_cap(Native_capability ep) override {
return call<Rpc_alloc_rpc_cap>(ep); }
void free_rpc_cap(Native_capability cap) override {
call<Rpc_free_rpc_cap>(cap); }
Capability<Region_map> address_space() override {
return call<Rpc_address_space>(); }
Capability<Region_map> stack_area() override {
return call<Rpc_stack_area>(); }
Capability<Region_map> linker_area() override {
return call<Rpc_linker_area>(); }
Capability quota accounting and trading This patch mirrors the accounting and trading scheme that Genode employs for physical memory to the accounting of capability allocations. Capability quotas must now be explicitly assigned to subsystems by specifying a 'caps=<amount>' attribute to init's start nodes. Analogously to RAM quotas, cap quotas can be traded between clients and servers as part of the session protocol. The capability budget of each component is maintained by the component's corresponding PD session at core. At the current stage, the accounting is applied to RPC capabilities, signal-context capabilities, and dataspace capabilities. Capabilities that are dynamically allocated via core's CPU and TRACE service are not yet covered. Also, the capabilities allocated by resource multiplexers outside of core (like nitpicker) must be accounted by the respective servers, which is not covered yet. If a component runs out of capabilities, core's PD service prints a warning to the log. To observe the consumption of capabilities per component in detail, the PD service is equipped with a diagnostic mode, which can be enabled via the 'diag' attribute in the target node of init's routing rules. E.g., the following route enables the diagnostic mode for the PD session of the "timer" component: <default-route> <service name="PD" unscoped_label="timer"> <parent diag="yes"/> </service> ... </default-route> For subsystems based on a sub-init instance, init can be configured to report the capability-quota information of its subsystems by adding the attribute 'child_caps="yes"' to init's '<report>' config node. Init's own capability quota can be reported by adding the attribute 'init_caps="yes"'. Fixes #2398
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void ref_account(Capability<Pd_session> pd) override {
call<Rpc_ref_account>(pd); }
void transfer_quota(Capability<Pd_session> pd, Cap_quota amount) override {
call<Rpc_transfer_cap_quota>(pd, amount); }
Cap_quota cap_quota() const override { return call<Rpc_cap_quota>(); }
Cap_quota used_caps() const override { return call<Rpc_used_caps>(); }
Capability quota accounting and trading This patch mirrors the accounting and trading scheme that Genode employs for physical memory to the accounting of capability allocations. Capability quotas must now be explicitly assigned to subsystems by specifying a 'caps=<amount>' attribute to init's start nodes. Analogously to RAM quotas, cap quotas can be traded between clients and servers as part of the session protocol. The capability budget of each component is maintained by the component's corresponding PD session at core. At the current stage, the accounting is applied to RPC capabilities, signal-context capabilities, and dataspace capabilities. Capabilities that are dynamically allocated via core's CPU and TRACE service are not yet covered. Also, the capabilities allocated by resource multiplexers outside of core (like nitpicker) must be accounted by the respective servers, which is not covered yet. If a component runs out of capabilities, core's PD service prints a warning to the log. To observe the consumption of capabilities per component in detail, the PD service is equipped with a diagnostic mode, which can be enabled via the 'diag' attribute in the target node of init's routing rules. E.g., the following route enables the diagnostic mode for the PD session of the "timer" component: <default-route> <service name="PD" unscoped_label="timer"> <parent diag="yes"/> </service> ... </default-route> For subsystems based on a sub-init instance, init can be configured to report the capability-quota information of its subsystems by adding the attribute 'child_caps="yes"' to init's '<report>' config node. Init's own capability quota can be reported by adding the attribute 'init_caps="yes"'. Fixes #2398
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Ram_dataspace_capability alloc(size_t size,
Cache_attribute cached = CACHED) override
{
return call<Rpc_alloc>(size, cached);
}
void free(Ram_dataspace_capability ds) override { call<Rpc_free>(ds); }
size_t dataspace_size(Ram_dataspace_capability ds) const override
{
return ds.valid() ? Dataspace_client(ds).size() : 0;
}
void transfer_quota(Pd_session_capability ram_session, Ram_quota amount) override {
call<Rpc_transfer_ram_quota>(ram_session, amount); }
Ram_quota ram_quota() const override { return call<Rpc_ram_quota>(); }
Ram_quota used_ram() const override { return call<Rpc_used_ram>(); }
Capability<Native_pd> native_pd() override { return call<Rpc_native_pd>(); }
};
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#endif /* _INCLUDE__PD_SESSION__CLIENT_H_ */