c056be239d
This patch implements interrupt enable/disable functions for each Rx queue. And we rely on flags of avail queue as the hint for virtio device to interrupt virtio driver or not. Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com> Tested-by: Lei Yao <lei.a.yao@intel.com> Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/*-
|
|
* BSD LICENSE
|
|
*
|
|
* Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* * Neither the name of Intel Corporation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#include <stdint.h>
|
|
|
|
#include <rte_mbuf.h>
|
|
|
|
#include "virtqueue.h"
|
|
#include "virtio_logs.h"
|
|
#include "virtio_pci.h"
|
|
|
|
/*
|
|
* Two types of mbuf to be cleaned:
|
|
* 1) mbuf that has been consumed by backend but not used by virtio.
|
|
* 2) mbuf that hasn't been consued by backend.
|
|
*/
|
|
struct rte_mbuf *
|
|
virtqueue_detatch_unused(struct virtqueue *vq)
|
|
{
|
|
struct rte_mbuf *cookie;
|
|
int idx;
|
|
|
|
if (vq != NULL)
|
|
for (idx = 0; idx < vq->vq_nentries; idx++) {
|
|
cookie = vq->vq_descx[idx].cookie;
|
|
if (cookie != NULL) {
|
|
vq->vq_descx[idx].cookie = NULL;
|
|
return cookie;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|