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kernel/virtqueue-wrappers.patch

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diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index e32b24b..83fa09a 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -50,7 +50,7 @@ static void blk_done(struct virtqueue *vq)
unsigned long flags;
spin_lock_irqsave(&vblk->lock, flags);
- while ((vbr = vblk->vq->vq_ops->get_buf(vblk->vq, &len)) != NULL) {
+ while ((vbr = virtqueue_get_buf(vblk->vq, &len)) != NULL) {
int error;
switch (vbr->status) {
@@ -158,7 +158,7 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
}
}
- if (vblk->vq->vq_ops->add_buf(vblk->vq, vblk->sg, out, in, vbr) < 0) {
+ if (virtqueue_add_buf(vblk->vq, vblk->sg, out, in, vbr) < 0) {
mempool_free(vbr, vblk->pool);
return false;
}
@@ -187,7 +187,7 @@ static void do_virtblk_request(struct request_queue *q)
}
if (issued)
- vblk->vq->vq_ops->kick(vblk->vq);
+ virtqueue_kick(vblk->vq);
}
static void virtblk_prepare_flush(struct request_queue *q, struct request *req)
diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c
index 64fe0a7..75f1cbd 100644
--- a/drivers/char/hw_random/virtio-rng.c
+++ b/drivers/char/hw_random/virtio-rng.c
@@ -32,7 +32,7 @@ static bool busy;
static void random_recv_done(struct virtqueue *vq)
{
/* We can get spurious callbacks, e.g. shared IRQs + virtio_pci. */
- if (!vq->vq_ops->get_buf(vq, &data_avail))
+ if (!virtqueue_get_buf(vq, &data_avail))
return;
complete(&have_data);
@@ -46,10 +46,10 @@ static void register_buffer(u8 *buf, size_t size)
sg_init_one(&sg, buf, size);
/* There should always be room for one buffer. */
- if (vq->vq_ops->add_buf(vq, &sg, 0, 1, buf) < 0)
+ if (virtqueue_add_buf(vq, &sg, 0, 1, buf) < 0)
BUG();
- vq->vq_ops->kick(vq);
+ virtqueue_kick(vq);
}
static int virtio_read(struct hwrng *rng, void *buf, size_t size, bool wait)
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 196428c..48ce834 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -328,7 +328,7 @@ static void *get_inbuf(struct port *port)
unsigned int len;
vq = port->in_vq;
- buf = vq->vq_ops->get_buf(vq, &len);
+ buf = virtqueue_get_buf(vq, &len);
if (buf) {
buf->len = len;
buf->offset = 0;
@@ -349,8 +349,8 @@ static int add_inbuf(struct virtqueue *vq, struct port_buffer *buf)
sg_init_one(sg, buf->buf, buf->size);
- ret = vq->vq_ops->add_buf(vq, sg, 0, 1, buf);
- vq->vq_ops->kick(vq);
+ ret = virtqueue_add_buf(vq, sg, 0, 1, buf);
+ virtqueue_kick(vq);
return ret;
}
@@ -366,7 +366,7 @@ static void discard_port_data(struct port *port)
if (port->inbuf)
buf = port->inbuf;
else
- buf = vq->vq_ops->get_buf(vq, &len);
+ buf = virtqueue_get_buf(vq, &len);
ret = 0;
while (buf) {
@@ -374,7 +374,7 @@ static void discard_port_data(struct port *port)
ret++;
free_buf(buf);
}
- buf = vq->vq_ops->get_buf(vq, &len);
+ buf = virtqueue_get_buf(vq, &len);
}
port->inbuf = NULL;
if (ret)
@@ -421,9 +421,9 @@ static ssize_t send_control_msg(struct port *port, unsigned int event,
vq = port->portdev->c_ovq;
sg_init_one(sg, &cpkt, sizeof(cpkt));
- if (vq->vq_ops->add_buf(vq, sg, 1, 0, &cpkt) >= 0) {
- vq->vq_ops->kick(vq);
- while (!vq->vq_ops->get_buf(vq, &len))
+ if (virtqueue_add_buf(vq, sg, 1, 0, &cpkt) >= 0) {
+ virtqueue_kick(vq);
+ while (!virtqueue_get_buf(vq, &len))
cpu_relax();
}
return 0;
@@ -439,10 +439,10 @@ static ssize_t send_buf(struct port *port, void *in_buf, size_t in_count)
out_vq = port->out_vq;
sg_init_one(sg, in_buf, in_count);
- ret = out_vq->vq_ops->add_buf(out_vq, sg, 1, 0, in_buf);
+ ret = virtqueue_add_buf(out_vq, sg, 1, 0, in_buf);
/* Tell Host to go! */
- out_vq->vq_ops->kick(out_vq);
+ virtqueue_kick(out_vq);
if (ret < 0) {
in_count = 0;
@@ -450,7 +450,7 @@ static ssize_t send_buf(struct port *port, void *in_buf, size_t in_count)
}
/* Wait till the host acknowledges it pushed out the data we sent. */
- while (!out_vq->vq_ops->get_buf(out_vq, &len))
+ while (!virtqueue_get_buf(out_vq, &len))
cpu_relax();
fail:
/* We're expected to return the amount of data we wrote */
@@ -901,7 +901,7 @@ static int remove_port(struct port *port)
discard_port_data(port);
/* Remove buffers we queued up for the Host to send us data in. */
- while ((buf = port->in_vq->vq_ops->detach_unused_buf(port->in_vq)))
+ while ((buf = virtqueue_detach_unused_buf(port->in_vq)))
free_buf(buf);
kfree(port->name);
@@ -1030,7 +1030,7 @@ static void control_work_handler(struct work_struct *work)
vq = portdev->c_ivq;
spin_lock(&portdev->cvq_lock);
- while ((buf = vq->vq_ops->get_buf(vq, &len))) {
+ while ((buf = virtqueue_get_buf(vq, &len))) {
spin_unlock(&portdev->cvq_lock);
buf->len = len;
@@ -1224,7 +1224,7 @@ static int add_port(struct ports_device *portdev, u32 id)
return 0;
free_inbufs:
- while ((buf = port->in_vq->vq_ops->detach_unused_buf(port->in_vq)))
+ while ((buf = virtqueue_detach_unused_buf(port->in_vq)))
free_buf(buf);
free_device:
device_destroy(pdrvdata.class, port->dev->devt);
@@ -1536,10 +1536,10 @@ static void virtcons_remove(struct virtio_device *vdev)
unregister_chrdev(portdev->chr_major, "virtio-portsdev");
- while ((buf = portdev->c_ivq->vq_ops->get_buf(portdev->c_ivq, &len)))
+ while ((buf = virtqueue_get_buf(portdev->c_ivq, &len)))
free_buf(buf);
- while ((buf = portdev->c_ivq->vq_ops->detach_unused_buf(portdev->c_ivq)))
+ while ((buf = virtqueue_detach_unused_buf(portdev->c_ivq)))
free_buf(buf);
vdev->config->del_vqs(vdev);
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index b0577dd..91738d8 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -119,7 +119,7 @@ static void skb_xmit_done(struct virtqueue *svq)
struct virtnet_info *vi = svq->vdev->priv;
/* Suppress further interrupts. */
- svq->vq_ops->disable_cb(svq);
+ virtqueue_disable_cb(svq);
/* We were probably waiting for more output buffers. */
netif_wake_queue(vi->dev);
@@ -207,7 +207,7 @@ static int receive_mergeable(struct virtnet_info *vi, struct sk_buff *skb)
return -EINVAL;
}
- page = vi->rvq->vq_ops->get_buf(vi->rvq, &len);
+ page = virtqueue_get_buf(vi->rvq, &len);
if (!page) {
pr_debug("%s: rx error: %d buffers missing\n",
skb->dev->name, hdr->mhdr.num_buffers);
@@ -339,7 +339,7 @@ static int add_recvbuf_small(struct virtnet_info *vi, gfp_t gfp)
skb_to_sgvec(skb, sg + 1, 0, skb->len);
- err = vi->rvq->vq_ops->add_buf(vi->rvq, sg, 0, 2, skb);
+ err = virtqueue_add_buf(vi->rvq, sg, 0, 2, skb);
if (err < 0)
dev_kfree_skb(skb);
@@ -386,7 +386,7 @@ static int add_recvbuf_big(struct virtnet_info *vi, gfp_t gfp)
/* chain first in list head */
first->private = (unsigned long)list;
- err = vi->rvq->vq_ops->add_buf(vi->rvq, sg, 0, MAX_SKB_FRAGS + 2,
+ err = virtqueue_add_buf(vi->rvq, sg, 0, MAX_SKB_FRAGS + 2,
first);
if (err < 0)
give_pages(vi, first);
@@ -406,7 +406,7 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp)
sg_init_one(&sg, page_address(page), PAGE_SIZE);
- err = vi->rvq->vq_ops->add_buf(vi->rvq, &sg, 0, 1, page);
+ err = virtqueue_add_buf(vi->rvq, &sg, 0, 1, page);
if (err < 0)
give_pages(vi, page);
@@ -435,7 +435,7 @@ static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp)
} while (err > 0);
if (unlikely(vi->num > vi->max))
vi->max = vi->num;
- vi->rvq->vq_ops->kick(vi->rvq);
+ virtqueue_kick(vi->rvq);
return !oom;
}
@@ -444,7 +444,7 @@ static void skb_recv_done(struct virtqueue *rvq)
struct virtnet_info *vi = rvq->vdev->priv;
/* Schedule NAPI, Suppress further interrupts if successful. */
if (napi_schedule_prep(&vi->napi)) {
- rvq->vq_ops->disable_cb(rvq);
+ virtqueue_disable_cb(rvq);
__napi_schedule(&vi->napi);
}
}
@@ -473,7 +473,7 @@ static int virtnet_poll(struct napi_struct *napi, int budget)
again:
while (received < budget &&
- (buf = vi->rvq->vq_ops->get_buf(vi->rvq, &len)) != NULL) {
+ (buf = virtqueue_get_buf(vi->rvq, &len)) != NULL) {
receive_buf(vi->dev, buf, len);
--vi->num;
received++;
@@ -487,9 +487,9 @@ again:
/* Out of packets? */
if (received < budget) {
napi_complete(napi);
- if (unlikely(!vi->rvq->vq_ops->enable_cb(vi->rvq)) &&
+ if (unlikely(!virtqueue_enable_cb(vi->rvq)) &&
napi_schedule_prep(napi)) {
- vi->rvq->vq_ops->disable_cb(vi->rvq);
+ virtqueue_disable_cb(vi->rvq);
__napi_schedule(napi);
goto again;
}
@@ -503,7 +503,7 @@ static unsigned int free_old_xmit_skbs(struct virtnet_info *vi)
struct sk_buff *skb;
unsigned int len, tot_sgs = 0;
- while ((skb = vi->svq->vq_ops->get_buf(vi->svq, &len)) != NULL) {
+ while ((skb = virtqueue_get_buf(vi->svq, &len)) != NULL) {
pr_debug("Sent skb %p\n", skb);
vi->dev->stats.tx_bytes += skb->len;
vi->dev->stats.tx_packets++;
@@ -559,7 +559,7 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
sg_set_buf(sg, &hdr->hdr, sizeof hdr->hdr);
hdr->num_sg = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1;
- return vi->svq->vq_ops->add_buf(vi->svq, sg, hdr->num_sg, 0, skb);
+ return virtqueue_add_buf(vi->svq, sg, hdr->num_sg, 0, skb);
}
static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
@@ -587,7 +587,7 @@ again:
kfree_skb(skb);
return NETDEV_TX_OK;
}
- vi->svq->vq_ops->kick(vi->svq);
+ virtqueue_kick(vi->svq);
/* Don't wait up for transmitted skbs to be freed. */
skb_orphan(skb);
@@ -595,12 +595,12 @@ again:
* before it gets out of hand. Naturally, this wastes entries. */
if (capacity < 2+MAX_SKB_FRAGS) {
netif_stop_queue(dev);
- if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
+ if (unlikely(!virtqueue_enable_cb(vi->svq))) {
/* More just got used, free them then recheck. */
capacity += free_old_xmit_skbs(vi);
if (capacity >= 2+MAX_SKB_FRAGS) {
netif_start_queue(dev);
- vi->svq->vq_ops->disable_cb(vi->svq);
+ virtqueue_disable_cb(vi->svq);
}
}
}
@@ -645,7 +645,7 @@ static int virtnet_open(struct net_device *dev)
* now. virtnet_poll wants re-enable the queue, so we disable here.
* We synchronize against interrupts via NAPI_STATE_SCHED */
if (napi_schedule_prep(&vi->napi)) {
- vi->rvq->vq_ops->disable_cb(vi->rvq);
+ virtqueue_disable_cb(vi->rvq);
__napi_schedule(&vi->napi);
}
return 0;
@@ -682,15 +682,15 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
sg_set_buf(&sg[i + 1], sg_virt(s), s->length);
sg_set_buf(&sg[out + in - 1], &status, sizeof(status));
- BUG_ON(vi->cvq->vq_ops->add_buf(vi->cvq, sg, out, in, vi) < 0);
+ BUG_ON(virtqueue_add_buf(vi->cvq, sg, out, in, vi) < 0);
- vi->cvq->vq_ops->kick(vi->cvq);
+ virtqueue_kick(vi->cvq);
/*
* Spin for a response, the kick causes an ioport write, trapping
* into the hypervisor, so the request should be handled immediately.
*/
- while (!vi->cvq->vq_ops->get_buf(vi->cvq, &tmp))
+ while (!virtqueue_get_buf(vi->cvq, &tmp))
cpu_relax();
return status == VIRTIO_NET_OK;
@@ -1006,13 +1006,13 @@ static void free_unused_bufs(struct virtnet_info *vi)
{
void *buf;
while (1) {
- buf = vi->svq->vq_ops->detach_unused_buf(vi->svq);
+ buf = virtqueue_detach_unused_buf(vi->svq);
if (!buf)
break;
dev_kfree_skb(buf);
}
while (1) {
- buf = vi->rvq->vq_ops->detach_unused_buf(vi->rvq);
+ buf = virtqueue_detach_unused_buf(vi->rvq);
if (!buf)
break;
if (vi->mergeable_rx_bufs || vi->big_packets)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index bfec7c2..0f1da45 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -75,7 +75,7 @@ static void balloon_ack(struct virtqueue *vq)
struct virtio_balloon *vb;
unsigned int len;
- vb = vq->vq_ops->get_buf(vq, &len);
+ vb = virtqueue_get_buf(vq, &len);
if (vb)
complete(&vb->acked);
}
@@ -89,9 +89,9 @@ static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq)
init_completion(&vb->acked);
/* We should always be able to add one buffer to an empty queue. */
- if (vq->vq_ops->add_buf(vq, &sg, 1, 0, vb) < 0)
+ if (virtqueue_add_buf(vq, &sg, 1, 0, vb) < 0)
BUG();
- vq->vq_ops->kick(vq);
+ virtqueue_kick(vq);
/* When host has read buffer, this completes via balloon_ack */
wait_for_completion(&vb->acked);
@@ -204,7 +204,7 @@ static void stats_request(struct virtqueue *vq)
struct virtio_balloon *vb;
unsigned int len;
- vb = vq->vq_ops->get_buf(vq, &len);
+ vb = virtqueue_get_buf(vq, &len);
if (!vb)
return;
vb->need_stats_update = 1;
@@ -221,9 +221,9 @@ static void stats_handle_request(struct virtio_balloon *vb)
vq = vb->stats_vq;
sg_init_one(&sg, vb->stats, sizeof(vb->stats));
- if (vq->vq_ops->add_buf(vq, &sg, 1, 0, vb) < 0)
+ if (virtqueue_add_buf(vq, &sg, 1, 0, vb) < 0)
BUG();
- vq->vq_ops->kick(vq);
+ virtqueue_kick(vq);
}
static void virtballoon_changed(struct virtio_device *vdev)
@@ -314,10 +314,9 @@ static int virtballoon_probe(struct virtio_device *vdev)
* use it to signal us later.
*/
sg_init_one(&sg, vb->stats, sizeof vb->stats);
- if (vb->stats_vq->vq_ops->add_buf(vb->stats_vq,
- &sg, 1, 0, vb) < 0)
+ if (virtqueue_add_buf(vb->stats_vq, &sg, 1, 0, vb) < 0)
BUG();
- vb->stats_vq->vq_ops->kick(vb->stats_vq);
+ virtqueue_kick(vb->stats_vq);
}
vb->thread = kthread_run(balloon, vb, "vballoon");
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 0f90634..0717b5b 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -155,11 +155,11 @@ static int vring_add_indirect(struct vring_virtqueue *vq,
return head;
}
-static int vring_add_buf(struct virtqueue *_vq,
- struct scatterlist sg[],
- unsigned int out,
- unsigned int in,
- void *data)
+int virtqueue_add_buf(struct virtqueue *_vq,
+ struct scatterlist sg[],
+ unsigned int out,
+ unsigned int in,
+ void *data)
{
struct vring_virtqueue *vq = to_vvq(_vq);
unsigned int i, avail, head, uninitialized_var(prev);
@@ -232,8 +232,9 @@ add_head:
return vq->num_free ? vq->vring.num : 0;
return vq->num_free;
}
+EXPORT_SYMBOL_GPL(virtqueue_add_buf);
-static void vring_kick(struct virtqueue *_vq)
+void virtqueue_kick(struct virtqueue *_vq)
{
struct vring_virtqueue *vq = to_vvq(_vq);
START_USE(vq);
@@ -253,6 +254,7 @@ static void vring_kick(struct virtqueue *_vq)
END_USE(vq);
}
+EXPORT_SYMBOL_GPL(virtqueue_kick);
static void detach_buf(struct vring_virtqueue *vq, unsigned int head)
{
@@ -284,7 +286,7 @@ static inline bool more_used(const struct vring_virtqueue *vq)
return vq->last_used_idx != vq->vring.used->idx;
}
-static void *vring_get_buf(struct virtqueue *_vq, unsigned int *len)
+void *virtqueue_get_buf(struct virtqueue *_vq, unsigned int *len)
{
struct vring_virtqueue *vq = to_vvq(_vq);
void *ret;
@@ -325,15 +327,17 @@ static void *vring_get_buf(struct virtqueue *_vq, unsigned int *len)
END_USE(vq);
return ret;
}
+EXPORT_SYMBOL_GPL(virtqueue_get_buf);
-static void vring_disable_cb(struct virtqueue *_vq)
+void virtqueue_disable_cb(struct virtqueue *_vq)
{
struct vring_virtqueue *vq = to_vvq(_vq);
vq->vring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
}
+EXPORT_SYMBOL_GPL(virtqueue_disable_cb);
-static bool vring_enable_cb(struct virtqueue *_vq)
+bool virtqueue_enable_cb(struct virtqueue *_vq)
{
struct vring_virtqueue *vq = to_vvq(_vq);
@@ -351,8 +355,9 @@ static bool vring_enable_cb(struct virtqueue *_vq)
END_USE(vq);
return true;
}
+EXPORT_SYMBOL_GPL(virtqueue_enable_cb);
-static void *vring_detach_unused_buf(struct virtqueue *_vq)
+void *virtqueue_detach_unused_buf(struct virtqueue *_vq)
{
struct vring_virtqueue *vq = to_vvq(_vq);
unsigned int i;
@@ -375,6 +380,7 @@ static void *vring_detach_unused_buf(struct virtqueue *_vq)
END_USE(vq);
return NULL;
}
+EXPORT_SYMBOL_GPL(virtqueue_detach_unused_buf);
irqreturn_t vring_interrupt(int irq, void *_vq)
{
@@ -396,15 +402,6 @@ irqreturn_t vring_interrupt(int irq, void *_vq)
}
EXPORT_SYMBOL_GPL(vring_interrupt);
-static struct virtqueue_ops vring_vq_ops = {
- .add_buf = vring_add_buf,
- .get_buf = vring_get_buf,
- .kick = vring_kick,
- .disable_cb = vring_disable_cb,
- .enable_cb = vring_enable_cb,
- .detach_unused_buf = vring_detach_unused_buf,
-};
-
struct virtqueue *vring_new_virtqueue(unsigned int num,
unsigned int vring_align,
struct virtio_device *vdev,
@@ -429,7 +426,6 @@ struct virtqueue *vring_new_virtqueue(unsigned int num,
vring_init(&vq->vring, num, pages, vring_align);
vq->vq.callback = callback;
vq->vq.vdev = vdev;
- vq->vq.vq_ops = &vring_vq_ops;
vq->vq.name = name;
vq->notify = notify;
vq->broken = false;
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 40d1709..5b0fce0 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -14,7 +14,6 @@
* @callback: the function to call when buffers are consumed (can be NULL).
* @name: the name of this virtqueue (mainly for debugging)
* @vdev: the virtio device this queue was created for.
- * @vq_ops: the operations for this virtqueue (see below).
* @priv: a pointer for the virtqueue implementation to use.
*/
struct virtqueue {
@@ -22,60 +21,60 @@ struct virtqueue {
void (*callback)(struct virtqueue *vq);
const char *name;
struct virtio_device *vdev;
- struct virtqueue_ops *vq_ops;
void *priv;
};
/**
- * virtqueue_ops - operations for virtqueue abstraction layer
- * @add_buf: expose buffer to other end
+ * operations for virtqueue
+ * virtqueue_add_buf: expose buffer to other end
* vq: the struct virtqueue we're talking about.
* sg: the description of the buffer(s).
* out_num: the number of sg readable by other side
* in_num: the number of sg which are writable (after readable ones)
* data: the token identifying the buffer.
* Returns remaining capacity of queue (sg segments) or a negative error.
- * @kick: update after add_buf
+ * virtqueue_kick: update after add_buf
* vq: the struct virtqueue
* After one or more add_buf calls, invoke this to kick the other side.
- * @get_buf: get the next used buffer
+ * virtqueue_get_buf: get the next used buffer
* vq: the struct virtqueue we're talking about.
* len: the length written into the buffer
* Returns NULL or the "data" token handed to add_buf.
- * @disable_cb: disable callbacks
+ * virtqueue_disable_cb: disable callbacks
* vq: the struct virtqueue we're talking about.
* Note that this is not necessarily synchronous, hence unreliable and only
* useful as an optimization.
- * @enable_cb: restart callbacks after disable_cb.
+ * virtqueue_enable_cb: restart callbacks after disable_cb.
* vq: the struct virtqueue we're talking about.
* This re-enables callbacks; it returns "false" if there are pending
* buffers in the queue, to detect a possible race between the driver
* checking for more work, and enabling callbacks.
- * @detach_unused_buf: detach first unused buffer
+ * virtqueue_detach_unused_buf: detach first unused buffer
* vq: the struct virtqueue we're talking about.
* Returns NULL or the "data" token handed to add_buf
*
* Locking rules are straightforward: the driver is responsible for
* locking. No two operations may be invoked simultaneously, with the exception
- * of @disable_cb.
+ * of virtqueue_disable_cb.
*
* All operations can be called in any context.
*/
-struct virtqueue_ops {
- int (*add_buf)(struct virtqueue *vq,
- struct scatterlist sg[],
- unsigned int out_num,
- unsigned int in_num,
- void *data);
- void (*kick)(struct virtqueue *vq);
+int virtqueue_add_buf(struct virtqueue *vq,
+ struct scatterlist sg[],
+ unsigned int out_num,
+ unsigned int in_num,
+ void *data);
- void *(*get_buf)(struct virtqueue *vq, unsigned int *len);
+void virtqueue_kick(struct virtqueue *vq);
- void (*disable_cb)(struct virtqueue *vq);
- bool (*enable_cb)(struct virtqueue *vq);
- void *(*detach_unused_buf)(struct virtqueue *vq);
-};
+void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
+
+void virtqueue_disable_cb(struct virtqueue *vq);
+
+bool virtqueue_enable_cb(struct virtqueue *vq);
+
+void *virtqueue_detach_unused_buf(struct virtqueue *vq);
/**
* virtio_device - representation of a device using virtio
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 7eb78ec..dcfbe99 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -137,7 +137,7 @@ static void req_done(struct virtqueue *vq)
P9_DPRINTK(P9_DEBUG_TRANS, ": request done\n");
- while ((rc = chan->vq->vq_ops->get_buf(chan->vq, &len)) != NULL) {
+ while ((rc = virtqueue_get_buf(chan->vq, &len)) != NULL) {
P9_DPRINTK(P9_DEBUG_TRANS, ": rc %p\n", rc);
P9_DPRINTK(P9_DEBUG_TRANS, ": lookup tag %d\n", rc->tag);
req = p9_tag_lookup(chan->client, rc->tag);
@@ -209,13 +209,13 @@ p9_virtio_request(struct p9_client *client, struct p9_req_t *req)
req->status = REQ_STATUS_SENT;
- if (chan->vq->vq_ops->add_buf(chan->vq, chan->sg, out, in, req->tc) < 0) {
+ if (virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc) < 0) {
P9_DPRINTK(P9_DEBUG_TRANS,
"9p debug: virtio rpc add_buf returned failure");
return -EIO;
}
- chan->vq->vq_ops->kick(chan->vq);
+ virtqueue_kick(chan->vq);
P9_DPRINTK(P9_DEBUG_TRANS, "9p debug: virtio request kicked\n");
return 0;
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