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_ */