2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
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.
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
26 /* Completion queue control */
28 u64 ring_base; /* 0x00 */
29 u32 ring_size; /* 0x08 */
31 u32 flow_control_enable; /* 0x10 */
33 u32 color_enable; /* 0x18 */
35 u32 cq_head; /* 0x20 */
37 u32 cq_tail; /* 0x28 */
39 u32 cq_tail_color; /* 0x30 */
41 u32 interrupt_enable; /* 0x38 */
43 u32 cq_entry_enable; /* 0x40 */
45 u32 cq_message_enable; /* 0x48 */
47 u32 interrupt_offset; /* 0x50 */
49 u64 cq_message_addr; /* 0x58 */
55 struct vnic_dev *vdev;
56 struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
57 struct vnic_dev_ring ring;
58 unsigned int to_clean;
59 unsigned int last_color;
62 static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
63 unsigned int work_to_do,
64 int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
65 u8 type, u16 q_number, u16 completed_index, void *opaque),
68 struct cq_desc *cq_desc;
69 unsigned int work_done = 0;
70 u16 q_number, completed_index;
73 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
74 cq->ring.desc_size * cq->to_clean);
75 cq_desc_dec(cq_desc, &type, &color,
76 &q_number, &completed_index);
78 while (color != cq->last_color) {
80 if ((*q_service)(cq->vdev, cq_desc, type,
81 q_number, completed_index, opaque))
85 if (cq->to_clean == cq->ring.desc_count) {
87 cq->last_color = cq->last_color ? 0 : 1;
90 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
91 cq->ring.desc_size * cq->to_clean);
92 cq_desc_dec(cq_desc, &type, &color,
93 &q_number, &completed_index);
96 if (work_done >= work_to_do)
103 void vnic_cq_free(struct vnic_cq *cq);
104 int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
105 unsigned int desc_count, unsigned int desc_size);
106 void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
107 unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
108 unsigned int cq_tail_color, unsigned int interrupt_enable,
109 unsigned int cq_entry_enable, unsigned int message_enable,
110 unsigned int interrupt_offset, u64 message_addr);
111 void vnic_cq_clean(struct vnic_cq *cq);
113 #endif /* _VNIC_CQ_H_ */