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drivers/scsi/fnic/vnic_cq_copy.h
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[SCSI] fnic: Add ...
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/*
* Copyright 2008 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _VNIC_CQ_COPY_H_
#define _VNIC_CQ_COPY_H_
#include "fcpio.h"
static inline unsigned int vnic_cq_copy_service(
struct vnic_cq *cq,
int (*q_service)(struct vnic_dev *vdev,
unsigned int index,
struct fcpio_fw_req *desc),
unsigned int work_to_do)
{
struct fcpio_fw_req *desc;
unsigned int work_done = 0;
u8 color;
desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
cq->ring.desc_size * cq->to_clean);
fcpio_color_dec(desc, &color);
while (color != cq->last_color) {
if ((*q_service)(cq->vdev, cq->index, desc))
break;
cq->to_clean++;
if (cq->to_clean == cq->ring.desc_count) {
cq->to_clean = 0;
cq->last_color = cq->last_color ? 0 : 1;
}
desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
cq->ring.desc_size * cq->to_clean);
fcpio_color_dec(desc, &color);
work_done++;
if (work_done >= work_to_do)
break;
}
return work_done;
}
#endif /* _VNIC_CQ_COPY_H_ */
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