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1 | /* |
2 | * Copyright 2014 Cisco Systems, Inc. All rights reserved. | |
3 | * | |
4 | * This program is free software; you may redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; version 2 of the License. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
9 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
10 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
11 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
12 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
14 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
15 | * SOFTWARE. | |
16 | */ | |
17 | ||
18 | #ifndef _VNIC_CQ_FW_H_ | |
19 | #define _VNIC_CQ_FW_H_ | |
20 | ||
21 | #include "snic_fwint.h" | |
22 | ||
23 | static inline unsigned int | |
24 | vnic_cq_fw_service(struct vnic_cq *cq, | |
25 | int (*q_service)(struct vnic_dev *vdev, | |
26 | unsigned int index, | |
27 | struct snic_fw_req *desc), | |
28 | unsigned int work_to_do) | |
29 | ||
30 | { | |
31 | struct snic_fw_req *desc; | |
32 | unsigned int work_done = 0; | |
33 | u8 color; | |
34 | ||
35 | desc = (struct snic_fw_req *)((u8 *)cq->ring.descs + | |
36 | cq->ring.desc_size * cq->to_clean); | |
37 | snic_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 snic_fw_req *)((u8 *)cq->ring.descs + | |
51 | cq->ring.desc_size * cq->to_clean); | |
52 | snic_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_FW_H_ */ |