2 * Copyright 2008-2010 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_ */