drivers/scsi/fnic/vnic_cq_copy.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   4  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   5  */
   6 #ifndef _VNIC_CQ_COPY_H_
   7 #define _VNIC_CQ_COPY_H_
   8
   9 #include "fcpio.h"
  10
  11 static inline unsigned int vnic_cq_copy_service(
  12         struct vnic_cq *cq,
  13         int (*q_service)(struct vnic_dev *vdev,
  14                          unsigned int index,
  15                          struct fcpio_fw_req *desc),
  16         unsigned int work_to_do)
  17
  18 {
  19         struct fcpio_fw_req *desc;
  20         unsigned int work_done = 0;
  21         u8 color;
  22
  23         desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
  24                 cq->ring.desc_size * cq->to_clean);
  25         fcpio_color_dec(desc, &color);
  26
  27         while (color != cq->last_color) {
  28
  29                 if ((*q_service)(cq->vdev, cq->index, desc))
  30                         break;
  31
  32                 cq->to_clean++;
  33                 if (cq->to_clean == cq->ring.desc_count) {
  34                         cq->to_clean = 0;
  35                         cq->last_color = cq->last_color ? 0 : 1;
  36                 }
  37
  38                 desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs +
  39                         cq->ring.desc_size * cq->to_clean);
  40                 fcpio_color_dec(desc, &color);
  41
  42                 work_done++;
  43                 if (work_done >= work_to_do)
  44                         break;
  45         }
  46
  47         return work_done;
  48 }
  49
  50 #endif /* _VNIC_CQ_COPY_H_ */