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authorEric Farman <farman@linux.ibm.com>2020-05-05 14:27:42 +0200
committerCornelia Huck <cohuck@redhat.com>2020-06-02 13:14:08 +0200
commit4296151d231eeee78514bf7f495c46683785255d (patch)
tree6a26318f44c4e97d2a7728cff10dc97a114ddd3c /drivers/s390
parent24c986748ba670c903a9d6a11ee96de2b3f5f1b8 (diff)
vfio-ccw: Refactor IRQ handlers
To simplify future expansion. Signed-off-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Message-Id: <20200505122745.53208-6-farman@linux.ibm.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/vfio_ccw_ops.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c
index 22988d67b6bb..c3a74ab7bb86 100644
--- a/drivers/s390/cio/vfio_ccw_ops.c
+++ b/drivers/s390/cio/vfio_ccw_ops.c
@@ -387,17 +387,21 @@ static int vfio_ccw_mdev_get_region_info(struct vfio_region_info *info,
static int vfio_ccw_mdev_get_irq_info(struct vfio_irq_info *info)
{
- if (info->index != VFIO_CCW_IO_IRQ_INDEX)
+ switch (info->index) {
+ case VFIO_CCW_IO_IRQ_INDEX:
+ info->count = 1;
+ info->flags = VFIO_IRQ_INFO_EVENTFD;
+ break;
+ default:
return -EINVAL;
-
- info->count = 1;
- info->flags = VFIO_IRQ_INFO_EVENTFD;
+ }
return 0;
}
static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev,
uint32_t flags,
+ uint32_t index,
void __user *data)
{
struct vfio_ccw_private *private;
@@ -407,7 +411,14 @@ static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev,
return -EINVAL;
private = dev_get_drvdata(mdev_parent_dev(mdev));
- ctx = &private->io_trigger;
+
+ switch (index) {
+ case VFIO_CCW_IO_IRQ_INDEX:
+ ctx = &private->io_trigger;
+ break;
+ default:
+ return -EINVAL;
+ }
switch (flags & VFIO_IRQ_SET_DATA_TYPE_MASK) {
case VFIO_IRQ_SET_DATA_NONE:
@@ -579,7 +590,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev,
return ret;
data = (void __user *)(arg + minsz);
- return vfio_ccw_mdev_set_irqs(mdev, hdr.flags, data);
+ return vfio_ccw_mdev_set_irqs(mdev, hdr.flags, hdr.index, data);
}
case VFIO_DEVICE_RESET:
return vfio_ccw_mdev_reset(mdev);

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