Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

[mirror_ubuntu-zesty-kernel.git] / drivers / s390 / kvm / virtio_ccw.c

diff --git a/drivers/s390/kvm/virtio_ccw.c b/drivers/s390/kvm/virtio_ccw.c
index 2029b6caa5956c2b4a01044b83325a0de16e3104..779dc5136291610f28361b7386151cc1bb4b9372 100644 (file)
--- a/drivers/s390/kvm/virtio_ccw.c
+++ b/drivers/s390/kvm/virtio_ccw.c
@@ -31,6 +31,7 @@
 #include <asm/irq.h>
 #include <asm/cio.h>
 #include <asm/ccwdev.h>
+#include <asm/virtio-ccw.h>
 
 /*
  * virtio related functions
@@ -77,12 +78,9 @@ struct virtio_ccw_vq_info {
        void *queue;
        struct vq_info_block *info_block;
        struct list_head node;
+       long cookie;
 };
 
-#define KVM_VIRTIO_CCW_RING_ALIGN 4096
-
-#define KVM_S390_VIRTIO_CCW_NOTIFY 3
-
 #define CCW_CMD_SET_VQ 0x13
 #define CCW_CMD_VDEV_RESET 0x33
 #define CCW_CMD_SET_IND 0x43
@@ -135,8 +133,11 @@ static int ccw_io_helper(struct virtio_ccw_device *vcdev,
        do {
                spin_lock_irqsave(get_ccwdev_lock(vcdev->cdev), flags);
                ret = ccw_device_start(vcdev->cdev, ccw, intparm, 0, 0);
-               if (!ret)
+               if (!ret) {
+                       if (!vcdev->curr_io)
+                               vcdev->err = 0;
                        vcdev->curr_io |= flag;
+               }
                spin_unlock_irqrestore(get_ccwdev_lock(vcdev->cdev), flags);
                cpu_relax();
        } while (ret == -EBUSY);
@@ -145,15 +146,18 @@ static int ccw_io_helper(struct virtio_ccw_device *vcdev,
 }
 
 static inline long do_kvm_notify(struct subchannel_id schid,
-                                unsigned long queue_index)
+                                unsigned long queue_index,
+                                long cookie)
 {
        register unsigned long __nr asm("1") = KVM_S390_VIRTIO_CCW_NOTIFY;
        register struct subchannel_id __schid asm("2") = schid;
        register unsigned long __index asm("3") = queue_index;
        register long __rc asm("2");
+       register long __cookie asm("4") = cookie;
 
        asm volatile ("diag 2,4,0x500\n"
-                     : "=d" (__rc) : "d" (__nr), "d" (__schid), "d" (__index)
+                     : "=d" (__rc) : "d" (__nr), "d" (__schid), "d" (__index),
+                     "d"(__cookie)
                      : "memory", "cc");
        return __rc;
 }
@@ -166,7 +170,7 @@ static void virtio_ccw_kvm_notify(struct virtqueue *vq)
 
        vcdev = to_vc_device(info->vq->vdev);
        ccw_device_get_schid(vcdev->cdev, &schid);
-       do_kvm_notify(schid, virtqueue_get_queue_index(vq));
+       info->cookie = do_kvm_notify(schid, vq->index, info->cookie);
 }
 
 static int virtio_ccw_read_vq_conf(struct virtio_ccw_device *vcdev,
@@ -188,7 +192,7 @@ static void virtio_ccw_del_vq(struct virtqueue *vq, struct ccw1 *ccw)
        unsigned long flags;
        unsigned long size;
        int ret;
-       unsigned int index = virtqueue_get_queue_index(vq);
+       unsigned int index = vq->index;
 
        /* Remove from our list. */
        spin_lock_irqsave(&vcdev->lock, flags);
@@ -610,7 +614,7 @@ static struct virtqueue *virtio_ccw_vq_by_ind(struct virtio_ccw_device *vcdev,
        vq = NULL;
        spin_lock_irqsave(&vcdev->lock, flags);
        list_for_each_entry(info, &vcdev->virtqueues, node) {
-               if (virtqueue_get_queue_index(info->vq) == index) {
+               if (info->vq->index == index) {
                        vq = info->vq;
                        break;
                }