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authorRusty Russell <rusty@rustcorp.com.au>2012-01-12 15:44:42 +1030
committerRusty Russell <rusty@rustcorp.com.au>2012-01-12 15:44:42 +1030
commit5dfc17628d57f9e62043ed0cba03a6e3eb019a78 (patch)
treea488dd3ea081166342904224db3cf039758f23d4 /include/linux/virtio.h
parent1e214a5c1a7e901fc8e98ad6ef84f11005f9ee9d (diff)
virtio: document functions better.
The old documentation is left over from when we used a structure with strategy pointers. And move the documentation to the C file as per kernel practice. Though I disagree... Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/virtio.h')
-rw-r--r--include/linux/virtio.h47
1 files changed, 0 insertions, 47 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 4c069d8bd740..73ad7243128f 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -25,53 +25,6 @@ struct virtqueue {
void *priv;
};
-/**
- * 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.
- * gfp: how to do memory allocations (if necessary).
- * Returns remaining capacity of queue (sg segments) or a negative error.
- * virtqueue_kick: update after add_buf
- * vq: the struct virtqueue
- * After one or more add_buf calls, invoke this to kick the other side.
- * 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.
- * 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.
- * 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.
- * virtqueue_enable_cb_delayed: restart callbacks after disable_cb.
- * vq: the struct virtqueue we're talking about.
- * This re-enables callbacks but hints to the other side to delay
- * interrupts until most of the available buffers have been processed;
- * it returns "false" if there are many pending buffers in the queue,
- * to detect a possible race between the driver checking for more work,
- * and enabling callbacks.
- * 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
- * virtqueue_get_vring_size: return the size of the virtqueue's vring
- * vq: the struct virtqueue containing the vring of interest.
- * Returns the size of the vring.
- *
- * Locking rules are straightforward: the driver is responsible for
- * locking. No two operations may be invoked simultaneously, with the exception
- * of virtqueue_disable_cb.
- *
- * All operations can be called in any context.
- */
-
int virtqueue_add_buf_gfp(struct virtqueue *vq,
struct scatterlist sg[],
unsigned int out_num,