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18#ifndef _VNIC_WQ_H_
19#define _VNIC_WQ_H_
20
21#include <linux/pci.h>
22#include "vnic_dev.h"
23#include "vnic_cq.h"
24
25
26
27
28
29#define vnic_wq_desc_avail fnic_wq_desc_avail
30#define vnic_wq_desc_used fnic_wq_desc_used
31#define vnic_wq_next_desc fni_cwq_next_desc
32#define vnic_wq_post fnic_wq_post
33#define vnic_wq_service fnic_wq_service
34#define vnic_wq_free fnic_wq_free
35#define vnic_wq_alloc fnic_wq_alloc
36#define vnic_wq_init fnic_wq_init
37#define vnic_wq_error_status fnic_wq_error_status
38#define vnic_wq_enable fnic_wq_enable
39#define vnic_wq_disable fnic_wq_disable
40#define vnic_wq_clean fnic_wq_clean
41
42
43struct vnic_wq_ctrl {
44 u64 ring_base;
45 u32 ring_size;
46 u32 pad0;
47 u32 posted_index;
48 u32 pad1;
49 u32 cq_index;
50 u32 pad2;
51 u32 enable;
52 u32 pad3;
53 u32 running;
54 u32 pad4;
55 u32 fetch_index;
56 u32 pad5;
57 u32 dca_value;
58 u32 pad6;
59 u32 error_interrupt_enable;
60 u32 pad7;
61 u32 error_interrupt_offset;
62 u32 pad8;
63 u32 error_status;
64 u32 pad9;
65};
66
67struct vnic_wq_buf {
68 struct vnic_wq_buf *next;
69 dma_addr_t dma_addr;
70 void *os_buf;
71 unsigned int len;
72 unsigned int index;
73 int sop;
74 void *desc;
75};
76
77
78#define VNIC_WQ_BUF_BLK_ENTRIES 64
79#define VNIC_WQ_BUF_BLK_SZ \
80 (VNIC_WQ_BUF_BLK_ENTRIES * sizeof(struct vnic_wq_buf))
81#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \
82 DIV_ROUND_UP(entries, VNIC_WQ_BUF_BLK_ENTRIES)
83#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096)
84
85struct vnic_wq {
86 unsigned int index;
87 struct vnic_dev *vdev;
88 struct vnic_wq_ctrl __iomem *ctrl;
89 struct vnic_dev_ring ring;
90 struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX];
91 struct vnic_wq_buf *to_use;
92 struct vnic_wq_buf *to_clean;
93 unsigned int pkts_outstanding;
94};
95
96static inline unsigned int vnic_wq_desc_avail(struct vnic_wq *wq)
97{
98
99 return wq->ring.desc_avail;
100}
101
102static inline unsigned int vnic_wq_desc_used(struct vnic_wq *wq)
103{
104
105 return wq->ring.desc_count - wq->ring.desc_avail - 1;
106}
107
108static inline void *vnic_wq_next_desc(struct vnic_wq *wq)
109{
110 return wq->to_use->desc;
111}
112
113static inline void vnic_wq_post(struct vnic_wq *wq,
114 void *os_buf, dma_addr_t dma_addr,
115 unsigned int len, int sop, int eop)
116{
117 struct vnic_wq_buf *buf = wq->to_use;
118
119 buf->sop = sop;
120 buf->os_buf = eop ? os_buf : NULL;
121 buf->dma_addr = dma_addr;
122 buf->len = len;
123
124 buf = buf->next;
125 if (eop) {
126
127
128
129
130
131 wmb();
132 iowrite32(buf->index, &wq->ctrl->posted_index);
133 }
134 wq->to_use = buf;
135
136 wq->ring.desc_avail--;
137}
138
139static inline void vnic_wq_service(struct vnic_wq *wq,
140 struct cq_desc *cq_desc, u16 completed_index,
141 void (*buf_service)(struct vnic_wq *wq,
142 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque),
143 void *opaque)
144{
145 struct vnic_wq_buf *buf;
146
147 buf = wq->to_clean;
148 while (1) {
149
150 (*buf_service)(wq, cq_desc, buf, opaque);
151
152 wq->ring.desc_avail++;
153
154 wq->to_clean = buf->next;
155
156 if (buf->index == completed_index)
157 break;
158
159 buf = wq->to_clean;
160 }
161}
162
163void vnic_wq_free(struct vnic_wq *wq);
164int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
165 unsigned int desc_count, unsigned int desc_size);
166void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
167 unsigned int error_interrupt_enable,
168 unsigned int error_interrupt_offset);
169unsigned int vnic_wq_error_status(struct vnic_wq *wq);
170void vnic_wq_enable(struct vnic_wq *wq);
171int vnic_wq_disable(struct vnic_wq *wq);
172void vnic_wq_clean(struct vnic_wq *wq,
173 void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf));
174
175#endif
176