diff options
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 36 | ||||
| -rw-r--r-- | include/linux/virtio.h | 71 |
2 files changed, 34 insertions, 73 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 0f90634bcb85..0717b5b000bb 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 18ccc686a429..5b0fce0d2aa2 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 { @@ -22,94 +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); -}; - -static inline int virtqueue_add_buf(struct virtqueue *vq, - struct scatterlist sg[], - unsigned int out_num, - unsigned int in_num, - void *data) -{ - return vq->vq_ops->add_buf(vq, sg, out_num, in_num, data); -} - -static inline int void virtqueue_kick(struct virtqueue *vq) -{ - return vq->vq_ops->kick(vq); -} - -static inline void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len) -{ - return vq->vq_ops->get_buf(vq, len); -} +void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len); -static inline void virtqueue_disable_cb(struct virtqueue *vq) -{ - vq->vq_ops->disable_cb(vq); -} +void virtqueue_disable_cb(struct virtqueue *vq); -static inline bool virtqueue_enable_cb(struct virtqueue *vq) -{ - return vq->vq_ops->enable_cb(vq); -} +bool virtqueue_enable_cb(struct virtqueue *vq); -static inline void *virtqueue_detach_unused_buf(struct virtqueue *vq) -{ - return vq->vq_ops->detach_unused_buf(vq); -} +void *virtqueue_detach_unused_buf(struct virtqueue *vq); /** * virtio_device - representation of a device using virtio |