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review.shift-gmbh.com / SHIFTPHONES / kernel / common / 6c474694530f377507f9aca438c17206e051e6e7 / . / virt / kvm / iodev.h
blob: 06e38b23fa61734d70d34eb3c318f12d4be96520 [file] [log] [blame]
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]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
Avi Kivityedf88412007-12-16 11:02:48 +0200[diff] [blame]19#include <linux/kvm_types.h>
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]20
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400[diff] [blame]21struct kvm_io_device;
22
Michael S. Tsirkin69fa2d72009-06-29 22:24:07 +0300[diff] [blame]23/**
24 * kvm_io_device_ops are called under kvm slots_lock.
25 **/
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400[diff] [blame]26struct kvm_io_device_ops {
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]27 void (*read)(struct kvm_io_device *this,
28 gpa_t addr,
29 int len,
30 void *val);
31 void (*write)(struct kvm_io_device *this,
32 gpa_t addr,
33 int len,
34 const void *val);
Laurent Vivier92760492008-05-30 16:05:53 +0200[diff] [blame]35 int (*in_range)(struct kvm_io_device *this, gpa_t addr, int len,
36 int is_write);
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]37 void (*destructor)(struct kvm_io_device *this);
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]38};
39
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400[diff] [blame]40
41struct kvm_io_device {
42 const struct kvm_io_device_ops *ops;
43};
44
45static inline void kvm_iodevice_init(struct kvm_io_device *dev,
46 const struct kvm_io_device_ops *ops)
47{
48 dev->ops = ops;
49}
50
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]51static inline void kvm_iodevice_read(struct kvm_io_device *dev,
52 gpa_t addr,
53 int len,
54 void *val)
55{
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400[diff] [blame]56 dev->ops->read(dev, addr, len, val);
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]57}
58
59static inline void kvm_iodevice_write(struct kvm_io_device *dev,
60 gpa_t addr,
61 int len,
62 const void *val)
63{
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400[diff] [blame]64 dev->ops->write(dev, addr, len, val);
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]65}
66
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400[diff] [blame]67static inline int kvm_iodevice_in_range(struct kvm_io_device *dev,
68 gpa_t addr, int len, int is_write)
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]69{
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400[diff] [blame]70 return dev->ops->in_range(dev, addr, len, is_write);
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]71}
72
73static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
74{
Gregory Haskinsd76685c2009-06-01 12:54:50 -0400[diff] [blame]75 if (dev->ops->destructor)
76 dev->ops->destructor(dev);
Hollis Blancharde2174022007-12-03 15:30:24 -0600[diff] [blame]77}
78
79#endif /* __KVM_IODEV_H__ */