[Qemu-devel] [PATCH] vfio-ccw: use vfio_set_irq_signaling

[Cornelia Huck]

Use the new helper.

Signed-off-by: Cornelia Huck <address@hidden>
---
 hw/vfio/ccw.c | 68 +++++++++++----------------------------------------
 1 file changed, 14 insertions(+), 54 deletions(-)

diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 03a2becb3ec9..3dc08721a3db 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -197,10 +197,7 @@ read_err:
 static void vfio_ccw_register_io_notifier(VFIOCCWDevice *vcdev, Error **errp)
 {
     VFIODevice *vdev = &vcdev->vdev;
-    struct vfio_irq_info *irq_info;
-    struct vfio_irq_set *irq_set;
-    size_t argsz;
-    int32_t *pfd;
+    int fd;
 
     if (vdev->num_irqs < VFIO_CCW_IO_IRQ_INDEX + 1) {
         error_setg(errp, "vfio: unexpected number of io irqs %u",
@@ -208,72 +205,35 @@ static void vfio_ccw_register_io_notifier(VFIOCCWDevice 
*vcdev, Error **errp)
         return;
     }
 
-    argsz = sizeof(*irq_info);
-    irq_info = g_malloc0(argsz);
-    irq_info->index = VFIO_CCW_IO_IRQ_INDEX;
-    irq_info->argsz = argsz;
-    if (ioctl(vdev->fd, VFIO_DEVICE_GET_IRQ_INFO,
-              irq_info) < 0 || irq_info->count < 1) {
-        error_setg_errno(errp, errno, "vfio: Error getting irq info");
-        goto out_free_info;
-    }
-
     if (event_notifier_init(&vcdev->io_notifier, 0)) {
         error_setg_errno(errp, errno,
                          "vfio: Unable to init event notifier for IO");
-        goto out_free_info;
+        return;
     }
 
-    argsz = sizeof(*irq_set) + sizeof(*pfd);
-    irq_set = g_malloc0(argsz);
-    irq_set->argsz = argsz;
-    irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
-                     VFIO_IRQ_SET_ACTION_TRIGGER;
-    irq_set->index = VFIO_CCW_IO_IRQ_INDEX;
-    irq_set->start = 0;
-    irq_set->count = 1;
-    pfd = (int32_t *) &irq_set->data;
-
-    *pfd = event_notifier_get_fd(&vcdev->io_notifier);
-    qemu_set_fd_handler(*pfd, vfio_ccw_io_notifier_handler, NULL, vcdev);
-    if (ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set)) {
-        error_setg(errp, "vfio: Failed to set up io notification");
-        qemu_set_fd_handler(*pfd, NULL, NULL, vcdev);
+    fd = event_notifier_get_fd(&vcdev->io_notifier);
+    qemu_set_fd_handler(fd, vfio_ccw_io_notifier_handler, NULL, vcdev);
+
+    if (vfio_set_irq_signaling(vdev, VFIO_CCW_IO_IRQ_INDEX, 0,
+                               VFIO_IRQ_SET_ACTION_TRIGGER, fd, errp)) {
+        qemu_set_fd_handler(fd, NULL, NULL, vcdev);
         event_notifier_cleanup(&vcdev->io_notifier);
     }
-
-    g_free(irq_set);
-
-out_free_info:
-    g_free(irq_info);
 }
 
 static void vfio_ccw_unregister_io_notifier(VFIOCCWDevice *vcdev)
 {
-    struct vfio_irq_set *irq_set;
-    size_t argsz;
-    int32_t *pfd;
-
-    argsz = sizeof(*irq_set) + sizeof(*pfd);
-    irq_set = g_malloc0(argsz);
-    irq_set->argsz = argsz;
-    irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
-                     VFIO_IRQ_SET_ACTION_TRIGGER;
-    irq_set->index = VFIO_CCW_IO_IRQ_INDEX;
-    irq_set->start = 0;
-    irq_set->count = 1;
-    pfd = (int32_t *) &irq_set->data;
-    *pfd = -1;
-
-    if (ioctl(vcdev->vdev.fd, VFIO_DEVICE_SET_IRQS, irq_set)) {
-        error_report("vfio: Failed to de-assign device io fd: %m");
+    Error *err = NULL;
+
+    vfio_set_irq_signaling(&vcdev->vdev, VFIO_CCW_IO_IRQ_INDEX, 0,
+                           VFIO_IRQ_SET_ACTION_TRIGGER, -1, &err);
+    if (err) {
+        error_reportf_err(err, VFIO_MSG_PREFIX, vcdev->vdev.name);
     }
 
     qemu_set_fd_handler(event_notifier_get_fd(&vcdev->io_notifier),
                         NULL, NULL, vcdev);
     event_notifier_cleanup(&vcdev->io_notifier);
-
-    g_free(irq_set);
 }
 
 static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp)
-- 
2.20.1