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18#ifndef _VNIC_WQ_COPY_H_
19#define _VNIC_WQ_COPY_H_
20
21#include <linux/pci.h>
22#include "vnic_wq.h"
23#include "fcpio.h"
24
25#define VNIC_WQ_COPY_MAX 1
26
27struct vnic_wq_copy {
28 unsigned int index;
29 struct vnic_dev *vdev;
30 struct vnic_wq_ctrl __iomem *ctrl;
31 struct vnic_dev_ring ring;
32 unsigned to_use_index;
33 unsigned to_clean_index;
34};
35
36static inline unsigned int vnic_wq_copy_desc_avail(struct vnic_wq_copy *wq)
37{
38 return wq->ring.desc_avail;
39}
40
41static inline unsigned int vnic_wq_copy_desc_in_use(struct vnic_wq_copy *wq)
42{
43 return wq->ring.desc_count - 1 - wq->ring.desc_avail;
44}
45
46static inline void *vnic_wq_copy_next_desc(struct vnic_wq_copy *wq)
47{
48 struct fcpio_host_req *desc = wq->ring.descs;
49 return &desc[wq->to_use_index];
50}
51
52static inline void vnic_wq_copy_post(struct vnic_wq_copy *wq)
53{
54
55 ((wq->to_use_index + 1) == wq->ring.desc_count) ?
56 (wq->to_use_index = 0) : (wq->to_use_index++);
57 wq->ring.desc_avail--;
58
59
60
61
62
63
64 wmb();
65
66 iowrite32(wq->to_use_index, &wq->ctrl->posted_index);
67}
68
69static inline void vnic_wq_copy_desc_process(struct vnic_wq_copy *wq, u16 index)
70{
71 unsigned int cnt;
72
73 if (wq->to_clean_index <= index)
74 cnt = (index - wq->to_clean_index) + 1;
75 else
76 cnt = wq->ring.desc_count - wq->to_clean_index + index + 1;
77
78 wq->to_clean_index = ((index + 1) % wq->ring.desc_count);
79 wq->ring.desc_avail += cnt;
80
81}
82
83static inline void vnic_wq_copy_service(struct vnic_wq_copy *wq,
84 u16 completed_index,
85 void (*q_service)(struct vnic_wq_copy *wq,
86 struct fcpio_host_req *wq_desc))
87{
88 struct fcpio_host_req *wq_desc = wq->ring.descs;
89 unsigned int curr_index;
90
91 while (1) {
92
93 if (q_service)
94 (*q_service)(wq, &wq_desc[wq->to_clean_index]);
95
96 wq->ring.desc_avail++;
97
98 curr_index = wq->to_clean_index;
99
100
101
102
103 ((wq->to_clean_index + 1) == wq->ring.desc_count) ?
104 (wq->to_clean_index = 0) : (wq->to_clean_index++);
105
106 if (curr_index == completed_index)
107 break;
108
109
110 if ((completed_index == (u16)-1) &&
111 (wq->to_clean_index == wq->to_use_index))
112 break;
113 }
114}
115
116void vnic_wq_copy_enable(struct vnic_wq_copy *wq);
117int vnic_wq_copy_disable(struct vnic_wq_copy *wq);
118void vnic_wq_copy_free(struct vnic_wq_copy *wq);
119int vnic_wq_copy_alloc(struct vnic_dev *vdev, struct vnic_wq_copy *wq,
120 unsigned int index, unsigned int desc_count, unsigned int desc_size);
121void vnic_wq_copy_init(struct vnic_wq_copy *wq, unsigned int cq_index,
122 unsigned int error_interrupt_enable,
123 unsigned int error_interrupt_offset);
124void vnic_wq_copy_clean(struct vnic_wq_copy *wq,
125 void (*q_clean)(struct vnic_wq_copy *wq,
126 struct fcpio_host_req *wq_desc));
127
128#endif
129