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usb block: use generic block driver API (Fix #966)

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This commit is contained in:
Stefan Kalkowski 2013-12-04 12:15:05 +01:00 committed by Christian Helmuth
parent c3c643bcf1
commit 277ca33988
3 changed files with 73 additions and 159 deletions
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123
dde_linux/src/lib/usb/include/storage/component.h
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@ -1,123 +0,0 @@
/*
* \brief Block-session implementation for USB storage
* \author Sebastian Sumpf <sebastian.sumpf@genode-labs.com>
* \date 2012-05-23
*/
/*
* Copyright (C) 2012-2013 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.
*/
#ifndef _STORAGE__COMPONENT_H_
#define _STORAGE__COMPONENT_H_
#include <root/component.h>
#include <block_session/rpc_object.h>
#include <signal/dispatch.h>
namespace Block {
using namespace Genode;
class Session_component;
struct Device : ::Device
{
/**
* Request block size for driver and medium
*/
virtual Genode::size_t block_size() = 0;
/**
* Request capacity of medium in blocks
*/
virtual Genode::size_t block_count() = 0;
virtual void io(Session_component *session, Packet_descriptor &packet,
addr_t virt, addr_t phys) = 0;
};
class Session_component : public Packet_session_component<Session_rpc_object>
{
private:
addr_t _rq_phys ; /* physical addr. of rq_ds */
Device *_device; /* device this session is using */
protected:
void _process_packets(unsigned)
{
while (tx_sink()->packet_avail())
{
Packet_descriptor packet = tx_sink()->get_packet();
addr_t virt = (addr_t)tx_sink()->packet_content(packet);
addr_t phys = _rq_phys + packet.offset();
try {
_device->io(this, packet, virt, phys);
} catch (...) { PERR("Failed to queue packet"); }
}
}
public:
/**
* Constructor
*/
Session_component(Dataspace_capability tx_ds,
Ram_dataspace_capability rx_ds,
Rpc_entrypoint &ep,
Signal_receiver *sig_rec,
::Device *device)
:
Packet_session_component(tx_ds, ep, sig_rec),
_rq_phys(Dataspace_client(tx_ds).phys_addr()),
_device(static_cast<Device *>(device))
{
env()->ram_session()->free(rx_ds);
}
void info(size_t *blk_count, size_t *blk_size,
Operations *ops)
{
*blk_count = _device->block_count();
*blk_size = _device->block_size();
ops->set_operation(Packet_descriptor::READ);
ops->set_operation(Packet_descriptor::WRITE);
}
void sync() {}
void complete(Packet_descriptor &packet, bool success)
{
packet.succeeded(success);
tx_sink()->acknowledge_packet(packet);
}
};
/*
* Shortcut for single-client root component
*/
typedef Root_component<Session_component, Single_client> Root_component;
/**
* Root component, handling new session requests
*/
class Root : public Packet_root<Root_component, Session_component, false>
{
public:
Root(Rpc_entrypoint *session_ep, Allocator *md_alloc,
Signal_receiver *sig_rec, Device *device)
:
Packet_root(session_ep, md_alloc, sig_rec, device) { }
};
}
#endif /* _STORAGE__COMPONENT_H_ */

1
dde_linux/src/lib/usb/main.cc
View File

@ -22,7 +22,6 @@
#include <nic_session/nic_session.h>
/* Local */
#include <storage/component.h>
#include <platform.h>
#include <routine.h>
#include <signal.h>

108
dde_linux/src/lib/usb/storage/storage.cc
View File

@ -12,21 +12,21 @@
*/
#include <base/rpc_server.h>
#include <block_session/block_session.h>
#include <block/component.h>
#include <cap_session/connection.h>
#include <util/endian.h>
#include <util/list.h>
#include <lx_emul.h>
#include <storage/component.h>
#include <platform/lx_mem.h>
#include <storage/scsi.h>
#include "signal.h"
static Signal_helper *_signal = 0;
class Storage_device : public Genode::List<Storage_device>::Element,
public Block::Device
public Block::Driver
{
private:
@ -45,7 +45,7 @@ class Storage_device : public Genode::List<Storage_device>::Element,
if (verbose)
PDBG("ACK packet for block: %zu status: %d", packet->block_number(), cmnd->result);
session->complete(*packet, true);
session->complete_packet(*packet);
Genode::destroy(Genode::env()->heap(), packet);
_scsi_free_command(cmnd);
}
@ -74,45 +74,27 @@ class Storage_device : public Genode::List<Storage_device>::Element,
Genode::uint32_t *data = (Genode::uint32_t *)scsi_buffer_data(cmnd);
_block_count = bswap(data[0]);
_block_size = bswap(data[1]);
/* if device returns the highest block number */
if (!_sdev->fix_capacity)
_block_count++;
if (verbose)
PDBG("block size: %zu block count: %llu", _block_size, _block_count);
scsi_free_buffer(cmnd);
_scsi_free_command(cmnd);
}
Storage_device(struct scsi_device *sdev) : _sdev(sdev)
void _io(Genode::size_t block_nr, Genode::size_t block_count,
Block::Packet_descriptor packet,
Genode::addr_t virt, Genode::addr_t phys, bool read)
{
/* read device capacity */
_capacity();
}
public:
static Storage_device *add(struct scsi_device *sdev) {
return new (Genode::env()->heap()) Storage_device(sdev); }
Genode::size_t block_size() { return _block_size; }
Genode::size_t block_count() { return _block_count; }
void io(Block::Session_component *session, Block::Packet_descriptor &packet,
Genode::addr_t virt, Genode::addr_t phys)
{
Block::sector_t block_nr = packet.block_number();
Genode::uint16_t block_count = packet.block_count() & 0xffff;
bool read = packet.operation() == Block::Packet_descriptor::WRITE ? false : true;
if (block_nr > _block_count)
throw -1;
throw Io_error();
if (verbose)
PDBG("PACKET: phys: %lx block: %llu count: %u %s",
PDBG("PACKET: phys: %lx block: %zu count: %u %s",
phys, block_nr, block_count, read ? "read" : "write");
struct scsi_cmnd *cmnd = _scsi_alloc_command();
@ -132,7 +114,7 @@ class Storage_device : public Genode::List<Storage_device>::Element,
memcpy(&cmnd->cmnd[2], &be_block_nr, 4);
/* transfer one block */
Genode::uint16_t be_block_count = bswap(block_count);
Genode::uint16_t be_block_count = bswap<Genode::uint16_t>(block_count);
memcpy(&cmnd->cmnd[7], &be_block_count, 2);
/* setup command */
@ -147,9 +129,54 @@ class Storage_device : public Genode::List<Storage_device>::Element,
/* send command to host driver */
if (_sdev->host->hostt->queuecommand(_sdev->host, cmnd)) {
throw -2;
throw Io_error();
}
}
public:
Storage_device(struct scsi_device *sdev)
: Block::Driver(), _sdev(sdev)
{
/* read device capacity */
_capacity();
}
Genode::size_t block_size() { return _block_size; }
Genode::size_t block_count() { return _block_count; }
Block::Session::Operations ops()
{
Block::Session::Operations o;
o.set_operation(Block::Packet_descriptor::READ);
o.set_operation(Block::Packet_descriptor::WRITE);
return o;
}
void read_dma(Genode::size_t block_number,
Genode::size_t block_count,
Genode::addr_t phys,
Block::Packet_descriptor &packet)
{
_io(block_number, block_count, packet,
(Genode::addr_t)session->tx_sink()->packet_content(packet),
phys, true);
}
void write_dma(Genode::size_t block_number,
Genode::size_t block_count,
Genode::addr_t phys,
Block::Packet_descriptor &packet)
{
_io(block_number, block_count, packet,
(Genode::addr_t)session->tx_sink()->packet_content(packet),
phys, false);
}
bool dma_enabled() { return true; }
Genode::Ram_dataspace_capability alloc_dma_buffer(Genode::size_t size) {
return Backend_memory::alloc(size, false); }
};
@ -157,12 +184,23 @@ void Storage::init(Genode::Signal_receiver *recv) {
_signal = new (Genode::env()->heap()) Signal_helper(recv); }
struct Factory : Block::Driver_factory
{
Storage_device device;
Factory(struct scsi_device *sdev) : device(sdev) {}
Block::Driver *create() { return &device; }
void destroy(Block::Driver *driver) { }
};
void scsi_add_device(struct scsi_device *sdev)
{
using namespace Genode;
static bool announce = false;
Storage_device *device = Storage_device::add(sdev);
static struct Factory factory(sdev);
/*
* XXX move to 'main'
@ -171,7 +209,7 @@ void scsi_add_device(struct scsi_device *sdev)
enum { STACK_SIZE = 1024 * sizeof(addr_t) };
static Cap_connection cap_stor;
static Rpc_entrypoint ep_stor(&cap_stor, STACK_SIZE, "usb_stor_ep");
static Block::Root root(&ep_stor, env()->heap(), _signal->receiver(), device);
static Block::Root root(&ep_stor, env()->heap(), factory, *_signal->receiver());
env()->parent()->announce(ep_stor.manage(&root));
announce = true;
}