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[Qemu-devel] [PATCH 07/15] virtio: add APIs for queue fields
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PATCH 07/15] virtio: add APIs for queue fields |
Date: |
Thu, 4 Feb 2010 14:46:20 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
vhost needs physical addresses for ring and other queue fields,
so add APIs for these.
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
hw/virtio.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++----
hw/virtio.h | 10 +++++++++-
2 files changed, 56 insertions(+), 5 deletions(-)
diff --git a/hw/virtio.c b/hw/virtio.c
index b9411e9..65e59c1 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -73,6 +73,9 @@ struct VirtQueue
int inuse;
uint16_t vector;
void (*handle_output)(VirtIODevice *vdev, VirtQueue *vq);
+ VirtIODevice *vdev;
+ EventNotifier guest_notifier;
+ EventNotifier host_notifier;
};
/* virt queue functions */
@@ -592,10 +595,10 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int
queue_size,
return &vdev->vq[i];
}
-void virtio_irq(VirtIODevice *vdev, VirtQueue *vq)
+void virtio_irq(VirtQueue *vq)
{
- vdev->isr |= 0x01;
- virtio_notify_vector(vdev, vq->vector);
+ vq->vdev->isr |= 0x01;
+ virtio_notify_vector(vq->vdev, vq->vector);
}
void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
@@ -606,7 +609,8 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
(vq->inuse || vring_avail_idx(vq) != vq->last_avail_idx)))
return;
- virtio_irq(vdev, vq);
+ vdev->isr |= 0x01;
+ virtio_notify_vector(vdev, vq->vector);
}
void virtio_notify_config(VirtIODevice *vdev)
@@ -740,3 +744,42 @@ void virtio_bind_device(VirtIODevice *vdev, const
VirtIOBindings *binding,
vdev->binding = binding;
vdev->binding_opaque = opaque;
}
+
+target_phys_addr_t virtio_queue_get_desc(VirtIODevice *vdev, int n)
+{
+ return vdev->vq[n].vring.desc;
+}
+
+target_phys_addr_t virtio_queue_get_avail(VirtIODevice *vdev, int n)
+{
+ return vdev->vq[n].vring.avail;
+}
+
+target_phys_addr_t virtio_queue_get_used(VirtIODevice *vdev, int n)
+{
+ return vdev->vq[n].vring.used;
+}
+
+uint16_t virtio_queue_last_avail_idx(VirtIODevice *vdev, int n)
+{
+ return vdev->vq[n].last_avail_idx;
+}
+
+void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx)
+{
+ vdev->vq[n].last_avail_idx = idx;
+}
+
+VirtQueue *virtio_queue(VirtIODevice *vdev, int n)
+{
+ return vdev->vq + n;
+}
+
+EventNotifier *virtio_queue_guest_notifier(VirtQueue *vq)
+{
+ return &vq->guest_notifier;
+}
+EventNotifier *virtio_queue_host_notifier(VirtQueue *vq)
+{
+ return &vq->host_notifier;
+}
diff --git a/hw/virtio.h b/hw/virtio.h
index 2c298a8..92ad5d1 100644
--- a/hw/virtio.h
+++ b/hw/virtio.h
@@ -183,5 +183,13 @@ void virtio_net_exit(VirtIODevice *vdev);
DEFINE_PROP_BIT("indirect_desc", _state, _field, \
VIRTIO_RING_F_INDIRECT_DESC, true)
-void virtio_irq(VirtIODevice *vdev, VirtQueue *vq);
+target_phys_addr_t virtio_queue_get_desc(VirtIODevice *vdev, int n);
+target_phys_addr_t virtio_queue_get_avail(VirtIODevice *vdev, int n);
+target_phys_addr_t virtio_queue_get_used(VirtIODevice *vdev, int n);
+uint16_t virtio_queue_last_avail_idx(VirtIODevice *vdev, int n);
+void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx);
+VirtQueue *virtio_queue(VirtIODevice *vdev, int n);
+EventNotifier *virtio_queue_guest_notifier(VirtQueue *vq);
+EventNotifier *virtio_queue_host_notifier(VirtQueue *vq);
+void virtio_irq(VirtQueue *vq);
#endif
--
1.6.6.144.g5c3af
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