dma_space

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// -*- Mode: C++ -*-
// vim:ft=cpp
/*
 * (c) 2014 Alexander Warg <alexander.warg@kernkonzept.com>
 *
 * License: see LICENSE.spdx (in this directory or the directories above)
 */
 
#pragma once
 
#include <l4/sys/types.h>
#include <l4/sys/l4int.h>
#include <l4/sys/capability>
#include <l4/re/dataspace>
#include <l4/re/protocols.h>
#include <l4/sys/cxx/types>
#include <l4/sys/cxx/ipc_types>
#include <l4/sys/cxx/ipc_iface>
 
namespace L4Re
{

class Dma_space :
  public L4::Kobject_0t< Dma_space,
                         L4RE_PROTO_DMA_SPACE,
                         L4::Type_info::Demand_t<1> >
{
public:
  typedef l4_uint64_t Dma_addr;

  enum Direction
  {
    Bidirectional, 
    To_device,     
    From_device,   
    None           
  };

  enum Attribute
  {
    No_sync
  };

  typedef L4::Types::Flags<Attribute> Attributes;

  enum Space_attrib
  {
    Coherent,

    Phys_space
  };

  typedef L4::Types::Flags<Space_attrib> Space_attribs;

  L4_INLINE_RPC(
      l4_ret_t, map, (L4::Ipc::Cap<L4Re::Dataspace> src,
                      L4Re::Dataspace::Offset offset,
                      L4::Ipc::In_out<l4_size_t *> size,
                      Attributes attrs, Direction dir,
                      Dma_addr *dma_addr));

  L4_INLINE_RPC(
      l4_ret_t, unmap, (Dma_addr dma_addr,
                        l4_size_t size, Attributes attrs, Direction dir));

  L4_INLINE_RPC(
      l4_ret_t, associate, (L4::Ipc::Opt<L4::Ipc::Cap<L4::Task> > dma_task,
                            Space_attribs attr),
      L4::Ipc::Call_t<L4_CAP_FPAGE_RW>);

  L4_INLINE_RPC(
      l4_ret_t, disassociate, (),
      L4::Ipc::Call_t<L4_CAP_FPAGE_RW>);
 
  typedef L4::Typeid::Rpcs<map_t, unmap_t, associate_t, disassociate_t> Rpcs;
};
 
}