| Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008 Cisco Systems, Inc. All rights reserved. |
| 3 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you may redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; version 2 of the License. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 10 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 11 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 12 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 13 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 14 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 15 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 16 | * SOFTWARE. |
| 17 | */ |
| 18 | #ifndef _VNIC_CQ_COPY_H_ |
| 19 | #define _VNIC_CQ_COPY_H_ |
| 20 | |
| 21 | #include "fcpio.h" |
| 22 | |
| 23 | static inline unsigned int vnic_cq_copy_service( |
| 24 | struct vnic_cq *cq, |
| 25 | int (*q_service)(struct vnic_dev *vdev, |
| 26 | unsigned int index, |
| 27 | struct fcpio_fw_req *desc), |
| 28 | unsigned int work_to_do) |
| 29 | |
| 30 | { |
| 31 | struct fcpio_fw_req *desc; |
| 32 | unsigned int work_done = 0; |
| 33 | u8 color; |
| 34 | |
| 35 | desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs + |
| 36 | cq->ring.desc_size * cq->to_clean); |
| 37 | fcpio_color_dec(desc, &color); |
| 38 | |
| 39 | while (color != cq->last_color) { |
| 40 | |
| 41 | if ((*q_service)(cq->vdev, cq->index, desc)) |
| 42 | break; |
| 43 | |
| 44 | cq->to_clean++; |
| 45 | if (cq->to_clean == cq->ring.desc_count) { |
| 46 | cq->to_clean = 0; |
| 47 | cq->last_color = cq->last_color ? 0 : 1; |
| 48 | } |
| 49 | |
| 50 | desc = (struct fcpio_fw_req *)((u8 *)cq->ring.descs + |
| 51 | cq->ring.desc_size * cq->to_clean); |
| 52 | fcpio_color_dec(desc, &color); |
| 53 | |
| 54 | work_done++; |
| 55 | if (work_done >= work_to_do) |
| 56 | break; |
| 57 | } |
| 58 | |
| 59 | return work_done; |
| 60 | } |
| 61 | |
| 62 | #endif /* _VNIC_CQ_COPY_H_ */ |