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vfio-ccw: Refactor ccw irq handler

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Make it easier to add new ones in the future.

Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200505125757.98209-5-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Eric Farman 2020-05-05 14:57:55 +02:00 committed by Cornelia Huck
parent 46ea3841ed
commit 690e29b911
1 changed files with 42 additions and 16 deletions
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58
hw/vfio/ccw.c
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@ -324,22 +324,36 @@ read_err:
css_inject_io_interrupt(sch);
}
static void vfio_ccw_register_io_notifier(VFIOCCWDevice *vcdev, Error **errp)
static void vfio_ccw_register_irq_notifier(VFIOCCWDevice *vcdev,
unsigned int irq,
Error **errp)
{
VFIODevice *vdev = &vcdev->vdev;
struct vfio_irq_info *irq_info;
size_t argsz;
int fd;
EventNotifier *notifier;
IOHandler *fd_read;
if (vdev->num_irqs < VFIO_CCW_IO_IRQ_INDEX + 1) {
error_setg(errp, "vfio: unexpected number of io irqs %u",
switch (irq) {
case VFIO_CCW_IO_IRQ_INDEX:
notifier = &vcdev->io_notifier;
fd_read = vfio_ccw_io_notifier_handler;
break;
default:
error_setg(errp, "vfio: Unsupported device irq(%d)", irq);
return;
}
if (vdev->num_irqs < irq + 1) {
error_setg(errp, "vfio: unexpected number of irqs %u",
vdev->num_irqs);
return;
}
argsz = sizeof(*irq_info);
irq_info = g_malloc0(argsz);
irq_info->index = VFIO_CCW_IO_IRQ_INDEX;
irq_info->index = irq;
irq_info->argsz = argsz;
if (ioctl(vdev->fd, VFIO_DEVICE_GET_IRQ_INFO,
irq_info) < 0 || irq_info->count < 1) {
@ -347,37 +361,49 @@ static void vfio_ccw_register_io_notifier(VFIOCCWDevice *vcdev, Error **errp)
goto out_free_info;
}
if (event_notifier_init(&vcdev->io_notifier, 0)) {
if (event_notifier_init(notifier, 0)) {
error_setg_errno(errp, errno,
"vfio: Unable to init event notifier for IO");
"vfio: Unable to init event notifier for irq (%d)",
irq);
goto out_free_info;
}
fd = event_notifier_get_fd(&vcdev->io_notifier);
qemu_set_fd_handler(fd, vfio_ccw_io_notifier_handler, NULL, vcdev);
fd = event_notifier_get_fd(notifier);
qemu_set_fd_handler(fd, fd_read, NULL, vcdev);
if (vfio_set_irq_signaling(vdev, VFIO_CCW_IO_IRQ_INDEX, 0,
if (vfio_set_irq_signaling(vdev, irq, 0,
VFIO_IRQ_SET_ACTION_TRIGGER, fd, errp)) {
qemu_set_fd_handler(fd, NULL, NULL, vcdev);
event_notifier_cleanup(&vcdev->io_notifier);
event_notifier_cleanup(notifier);
}
out_free_info:
g_free(irq_info);
}
static void vfio_ccw_unregister_io_notifier(VFIOCCWDevice *vcdev)
static void vfio_ccw_unregister_irq_notifier(VFIOCCWDevice *vcdev,
unsigned int irq)
{
Error *err = NULL;
EventNotifier *notifier;
if (vfio_set_irq_signaling(&vcdev->vdev, VFIO_CCW_IO_IRQ_INDEX, 0,
switch (irq) {
case VFIO_CCW_IO_IRQ_INDEX:
notifier = &vcdev->io_notifier;
break;
default:
error_report("vfio: Unsupported device irq(%d)", irq);
return;
}
if (vfio_set_irq_signaling(&vcdev->vdev, irq, 0,
VFIO_IRQ_SET_ACTION_TRIGGER, -1, &err)) {
error_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
}
qemu_set_fd_handler(event_notifier_get_fd(&vcdev->io_notifier),
qemu_set_fd_handler(event_notifier_get_fd(notifier),
NULL, NULL, vcdev);
event_notifier_cleanup(&vcdev->io_notifier);
event_notifier_cleanup(notifier);
}
static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp)
@ -565,7 +591,7 @@ static void vfio_ccw_realize(DeviceState *dev, Error **errp)
goto out_region_err;
}
vfio_ccw_register_io_notifier(vcdev, &err);
vfio_ccw_register_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX, &err);
if (err) {
goto out_notifier_err;
}
@ -594,7 +620,7 @@ static void vfio_ccw_unrealize(DeviceState *dev)
S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev);
VFIOGroup *group = vcdev->vdev.group;
vfio_ccw_unregister_io_notifier(vcdev);
vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX);
vfio_ccw_put_region(vcdev);
vfio_ccw_put_device(vcdev);
vfio_put_group(group);