scsi/snic/vnic_cq_fw.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /* Copyright 2014 Cisco Systems, Inc.  All rights reserved. */
0003
0004 #ifndef _VNIC_CQ_FW_H_
0005 #define _VNIC_CQ_FW_H_
0006
0007 #include "snic_fwint.h"
0008
0009 static inline unsigned int
0010 vnic_cq_fw_service(struct vnic_cq *cq,
0011            int (*q_service)(struct vnic_dev *vdev,
0012                     unsigned int index,
0013                     struct snic_fw_req *desc),
0014            unsigned int work_to_do)
0015
0016 {
0017     struct snic_fw_req *desc;
0018     unsigned int work_done = 0;
0019     u8 color;
0020
0021     desc = (struct snic_fw_req *)((u8 *)cq->ring.descs +
0022         cq->ring.desc_size * cq->to_clean);
0023     snic_color_dec(desc, &color);
0024
0025     while (color != cq->last_color) {
0026
0027         if ((*q_service)(cq->vdev, cq->index, desc))
0028             break;
0029
0030         cq->to_clean++;
0031         if (cq->to_clean == cq->ring.desc_count) {
0032             cq->to_clean = 0;
0033             cq->last_color = cq->last_color ? 0 : 1;
0034         }
0035
0036         desc = (struct snic_fw_req *)((u8 *)cq->ring.descs +
0037             cq->ring.desc_size * cq->to_clean);
0038         snic_color_dec(desc, &color);
0039
0040         work_done++;
0041         if (work_done >= work_to_do)
0042             break;
0043     }
0044
0045     return work_done;
0046 }
0047
0048 #endif /* _VNIC_CQ_FW_H_ */