LXR linux/virt/kvm/iodev.h

   1/*
   2 * This program is free software; you can redistribute it and/or modify
   3 * it under the terms of the GNU General Public License as published by
   4 * the Free Software Foundation; either version 2 of the License.
   5 *
   6 * This program is distributed in the hope that it will be useful,
   7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 * GNU General Public License for more details.
  10 *
  11 * You should have received a copy of the GNU General Public License
  12 * along with this program; if not, write to the Free Software
  13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14 */
  15
  16#ifndef __KVM_IODEV_H__
  17#define __KVM_IODEV_H__
  18
  19#include <linux/kvm_types.h>
  20
  21struct kvm_io_device {
  22        void (*read)(struct kvm_io_device *this,
  23                     gpa_t addr,
  24                     int len,
  25                     void *val);
  26        void (*write)(struct kvm_io_device *this,
  27                      gpa_t addr,
  28                      int len,
  29                      const void *val);
  30        int (*in_range)(struct kvm_io_device *this, gpa_t addr, int len,
  31                        int is_write);
  32        void (*destructor)(struct kvm_io_device *this);
  33
  34        void             *private;
  35};
  36
  37static inline void kvm_iodevice_read(struct kvm_io_device *dev,
  38                                     gpa_t addr,
  39                                     int len,
  40                                     void *val)
  41{
  42        dev->read(dev, addr, len, val);
  43}
  44
  45static inline void kvm_iodevice_write(struct kvm_io_device *dev,
  46                                      gpa_t addr,
  47                                      int len,
  48                                      const void *val)
  49{
  50        dev->write(dev, addr, len, val);
  51}
  52
  53static inline int kvm_iodevice_inrange(struct kvm_io_device *dev,
  54                                       gpa_t addr, int len, int is_write)
  55{
  56        return dev->in_range(dev, addr, len, is_write);
  57}
  58
  59static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
  60{
  61        if (dev->destructor)
  62                dev->destructor(dev);
  63}
  64
  65#endif /* __KVM_IODEV_H__ */
  66