133 lines
3.5 KiB
C++
133 lines
3.5 KiB
C++
/*
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* \brief Test for the block session server side
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* \author Stefan Kalkowski
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* \date 2010-07-06
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*
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* This test app provides the framebuffer it requests via framebuffer session
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* as a block device.
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*/
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/*
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* Copyright (C) 2010-2013 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 <cap_session/connection.h>
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#include <framebuffer_session/connection.h>
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#include <block/component.h>
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#include <block/driver.h>
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class Driver : public Block::Driver
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{
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private:
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enum { BLOCK_SIZE = 512 };
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Framebuffer::Connection _fb;
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Framebuffer::Mode _fb_mode;
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Genode::Dataspace_capability _fb_cap;
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Genode::Dataspace_client _fb_dsc;
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Genode::addr_t _fb_addr;
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Genode::size_t _fb_size;
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public:
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Driver()
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: _fb_mode(_fb.mode()),
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_fb_cap(_fb.dataspace()),
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_fb_dsc(_fb_cap),
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_fb_addr(Genode::env()->rm_session()->attach(_fb_cap)),
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_fb_size(_fb_dsc.size()){}
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/*******************************
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** Block::Driver interface **
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*******************************/
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Genode::size_t block_size() { return BLOCK_SIZE; }
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Genode::size_t block_count() { return _fb_size / BLOCK_SIZE; }
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Block::Session::Operations ops()
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{
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Block::Session::Operations ops;
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ops.set_operation(Block::Packet_descriptor::READ);
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ops.set_operation(Block::Packet_descriptor::WRITE);
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return ops;
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}
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void read(Genode::size_t block_number,
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Genode::size_t block_count,
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char *buffer,
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Block::Packet_descriptor &packet)
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{
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/* sanity check block number */
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if (block_number + block_count > _fb_size / BLOCK_SIZE) {
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PWRN("Out of range: requested %zd blocks from block %zd",
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block_count, block_number);
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return;
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}
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Genode::size_t offset = block_number * BLOCK_SIZE;
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Genode::size_t size = block_count * BLOCK_SIZE;
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Genode::memcpy((void*)buffer, (void*)(_fb_addr + offset), size);
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session->complete_packet(packet);
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}
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void write(Genode::size_t block_number,
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Genode::size_t block_count,
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char const *buffer,
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Block::Packet_descriptor &packet)
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{
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/* sanity check block number */
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if (block_number + block_count > _fb_size / BLOCK_SIZE) {
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PWRN("Out of range: requested %zd blocks from block %zd",
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block_count, block_number);
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return;
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}
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Genode::size_t offset = block_number * BLOCK_SIZE;
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Genode::size_t size = block_count * BLOCK_SIZE;
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Genode::memcpy((void*)(_fb_addr + offset), (void*)buffer, size);
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_fb.refresh(0, 0, _fb_mode.width(), _fb_mode.height());
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session->complete_packet(packet);
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}
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};
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struct Factory : Block::Driver_factory
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{
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Block::Driver *create() {
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return new (Genode::env()->heap()) Driver(); }
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void destroy(Block::Driver *driver) {
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Genode::destroy(Genode::env()->heap(), driver); }
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};
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int main()
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{
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using namespace Genode;
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enum { STACK_SIZE = 2048 * sizeof(Genode::addr_t) };
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static Cap_connection cap;
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static Rpc_entrypoint ep(&cap, STACK_SIZE, "fb_block_ep");
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static Signal_receiver receiver;
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static Factory driver_factory;
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static Block::Root block_root(&ep, env()->heap(), driver_factory, receiver);
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env()->parent()->announce(ep.manage(&block_root));
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while (true) {
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Signal s = receiver.wait_for_signal();
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static_cast<Signal_dispatcher_base *>(s.context())->dispatch(s.num());
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}
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return 0;
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}
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