drivers/scsi/snic/vnic_cq_fw.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /* Copyright 2014 Cisco Systems, Inc.  All rights reserved. */
   3
   4 #ifndef _VNIC_CQ_FW_H_
   5 #define _VNIC_CQ_FW_H_
   6
   7 #include "snic_fwint.h"
   8
   9 static inline unsigned int
  10 vnic_cq_fw_service(struct vnic_cq *cq,
  11                    int (*q_service)(struct vnic_dev *vdev,
  12                                     unsigned int index,
  13                                     struct snic_fw_req *desc),
  14                    unsigned int work_to_do)
  15
  16 {
  17         struct snic_fw_req *desc;
  18         unsigned int work_done = 0;
  19         u8 color;
  20
  21         desc = (struct snic_fw_req *)((u8 *)cq->ring.descs +
  22                 cq->ring.desc_size * cq->to_clean);
  23         snic_color_dec(desc, &color);
  24
  25         while (color != cq->last_color) {
  26
  27                 if ((*q_service)(cq->vdev, cq->index, desc))
  28                         break;
  29
  30                 cq->to_clean++;
  31                 if (cq->to_clean == cq->ring.desc_count) {
  32                         cq->to_clean = 0;
  33                         cq->last_color = cq->last_color ? 0 : 1;
  34                 }
  35
  36                 desc = (struct snic_fw_req *)((u8 *)cq->ring.descs +
  37                         cq->ring.desc_size * cq->to_clean);
  38                 snic_color_dec(desc, &color);
  39
  40                 work_done++;
  41                 if (work_done >= work_to_do)
  42                         break;
  43         }
  44
  45         return work_done;
  46 }
  47
  48 #endif /* _VNIC_CQ_FW_H_ */