mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-04 08:17:46 +00:00
120e214e50
Realize VFIO_DEVICE_GET_IRQ_INFO ioctl to retrieve VFIO_CCW_IO_IRQ information. Realize VFIO_DEVICE_SET_IRQS ioctl to set an eventfd fd for VFIO_CCW_IO_IRQ. Once a write operation to the ccw_io_region was performed, trigger a signal on this fd. Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com> Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Acked-by: Alex Williamson <alex.williamson@redhat.com> Message-Id: <20170317031743.40128-12-bjsdjshi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
|
|
* Private stuff for vfio_ccw driver
|
|
*
|
|
* Copyright IBM Corp. 2017
|
|
*
|
|
* Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
|
|
* Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
|
|
*/
|
|
|
|
#ifndef _VFIO_CCW_PRIVATE_H_
|
|
#define _VFIO_CCW_PRIVATE_H_
|
|
|
|
#include <linux/completion.h>
|
|
#include <linux/eventfd.h>
|
|
#include <linux/vfio_ccw.h>
|
|
|
|
#include "css.h"
|
|
#include "vfio_ccw_cp.h"
|
|
|
|
/**
|
|
* struct vfio_ccw_private
|
|
* @sch: pointer to the subchannel
|
|
* @completion: synchronization helper of the I/O completion
|
|
* @avail: available for creating a mediated device
|
|
* @mdev: pointer to the mediated device
|
|
* @nb: notifier for vfio events
|
|
* @io_region: MMIO region to input/output I/O arguments/results
|
|
* @wait_q: wait for interrupt
|
|
* @intparm: record current interrupt parameter, used for wait interrupt
|
|
* @cp: channel program for the current I/O operation
|
|
* @irb: irb info received from interrupt
|
|
* @scsw: scsw info
|
|
* @io_trigger: eventfd ctx for signaling userspace I/O results
|
|
*/
|
|
struct vfio_ccw_private {
|
|
struct subchannel *sch;
|
|
struct completion *completion;
|
|
atomic_t avail;
|
|
struct mdev_device *mdev;
|
|
struct notifier_block nb;
|
|
struct ccw_io_region io_region;
|
|
|
|
wait_queue_head_t wait_q;
|
|
u32 intparm;
|
|
struct channel_program cp;
|
|
struct irb irb;
|
|
union scsw scsw;
|
|
|
|
struct eventfd_ctx *io_trigger;
|
|
} __aligned(8);
|
|
|
|
extern int vfio_ccw_mdev_reg(struct subchannel *sch);
|
|
extern void vfio_ccw_mdev_unreg(struct subchannel *sch);
|
|
|
|
extern int vfio_ccw_sch_quiesce(struct subchannel *sch);
|
|
extern int vfio_ccw_sch_cmd_request(struct vfio_ccw_private *private);
|
|
|
|
#endif
|