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
  21 struct 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
  37 static 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
  45 static 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
  53 static 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
  59 static 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__ */