]>
git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blob - drivers/s390/cio/vfio_ccw_private.h
2 * Private stuff for vfio_ccw driver
4 * Copyright IBM Corp. 2017
6 * Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
7 * Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
10 #ifndef _VFIO_CCW_PRIVATE_H_
11 #define _VFIO_CCW_PRIVATE_H_
13 #include <linux/completion.h>
14 #include <linux/eventfd.h>
15 #include <linux/workqueue.h>
16 #include <linux/vfio_ccw.h>
19 #include "vfio_ccw_cp.h"
22 * struct vfio_ccw_private
23 * @sch: pointer to the subchannel
24 * @state: internal state of the device
25 * @completion: synchronization helper of the I/O completion
26 * @avail: available for creating a mediated device
27 * @mdev: pointer to the mediated device
28 * @nb: notifier for vfio events
29 * @io_region: MMIO region to input/output I/O arguments/results
30 * @cp: channel program for the current I/O operation
31 * @irb: irb info received from interrupt
33 * @io_trigger: eventfd ctx for signaling userspace I/O results
34 * @io_work: work for deferral process of I/O handling
36 struct vfio_ccw_private
{
37 struct subchannel
*sch
;
39 struct completion
*completion
;
41 struct mdev_device
*mdev
;
42 struct notifier_block nb
;
43 struct ccw_io_region io_region
;
45 struct channel_program cp
;
49 struct eventfd_ctx
*io_trigger
;
50 struct work_struct io_work
;
53 extern int vfio_ccw_mdev_reg(struct subchannel
*sch
);
54 extern void vfio_ccw_mdev_unreg(struct subchannel
*sch
);
56 extern int vfio_ccw_sch_quiesce(struct subchannel
*sch
);
59 * States of the device statemachine.
62 VFIO_CCW_STATE_NOT_OPER
,
63 VFIO_CCW_STATE_STANDBY
,
72 * Asynchronous events of the device statemachine.
75 VFIO_CCW_EVENT_NOT_OPER
,
76 VFIO_CCW_EVENT_IO_REQ
,
77 VFIO_CCW_EVENT_INTERRUPT
,
83 * Action called through jumptable.
85 typedef void (fsm_func_t
)(struct vfio_ccw_private
*, enum vfio_ccw_event
);
86 extern fsm_func_t
*vfio_ccw_jumptable
[NR_VFIO_CCW_STATES
][NR_VFIO_CCW_EVENTS
];
88 static inline void vfio_ccw_fsm_event(struct vfio_ccw_private
*private,
91 vfio_ccw_jumptable
[private->state
][event
](private, event
);
94 extern struct workqueue_struct
*vfio_ccw_work_q
;