1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/* SPDX-License-Identifier: GPL-2.0 */
/* Interface for implementing AF_XDP zero-copy support in drivers.
* Copyright(c) 2020 Intel Corporation.
*/
#ifndef _LINUX_XDP_SOCK_DRV_H
#define _LINUX_XDP_SOCK_DRV_H
#include <net/xdp_sock.h>
#ifdef CONFIG_XDP_SOCKETS
bool xsk_umem_has_addrs(struct xdp_umem *umem, u32 cnt);
bool xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr);
void xsk_umem_release_addr(struct xdp_umem *umem);
void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries);
bool xsk_umem_consume_tx(struct xdp_umem *umem, struct xdp_desc *desc);
void xsk_umem_consume_tx_done(struct xdp_umem *umem);
struct xdp_umem_fq_reuse *xsk_reuseq_prepare(u32 nentries);
struct xdp_umem_fq_reuse *xsk_reuseq_swap(struct xdp_umem *umem,
struct xdp_umem_fq_reuse *newq);
void xsk_reuseq_free(struct xdp_umem_fq_reuse *rq);
struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev, u16 queue_id);
void xsk_set_rx_need_wakeup(struct xdp_umem *umem);
void xsk_set_tx_need_wakeup(struct xdp_umem *umem);
void xsk_clear_rx_need_wakeup(struct xdp_umem *umem);
void xsk_clear_tx_need_wakeup(struct xdp_umem *umem);
bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem);
static inline char *xdp_umem_get_data(struct xdp_umem *umem, u64 addr)
{
unsigned long page_addr;
addr = xsk_umem_add_offset_to_addr(addr);
page_addr = (unsigned long)umem->pages[addr >> PAGE_SHIFT].addr;
return (char *)(page_addr & PAGE_MASK) + (addr & ~PAGE_MASK);
}
static inline dma_addr_t xdp_umem_get_dma(struct xdp_umem *umem, u64 addr)
{
addr = xsk_umem_add_offset_to_addr(addr);
return umem->pages[addr >> PAGE_SHIFT].dma + (addr & ~PAGE_MASK);
}
/* Reuse-queue aware version of FILL queue helpers */
static inline bool xsk_umem_has_addrs_rq(struct xdp_umem *umem, u32 cnt)
{
struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
if (rq->length >= cnt)
return true;
return xsk_umem_has_addrs(umem, cnt - rq->length);
}
static inline bool xsk_umem_peek_addr_rq(struct xdp_umem *umem, u64 *addr)
{
struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
if (!rq->length)
return xsk_umem_peek_addr(umem, addr);
*addr = rq->handles[rq->length - 1];
return addr;
}
static inline void xsk_umem_release_addr_rq(struct xdp_umem *umem)
{
struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
if (!rq->length)
xsk_umem_release_addr(umem);
else
rq->length--;
}
static inline void xsk_umem_fq_reuse(struct xdp_umem *umem, u64 addr)
{
struct xdp_umem_fq_reuse *rq = umem->fq_reuse;
rq->handles[rq->length++] = addr;
}
/* Handle the offset appropriately depending on aligned or unaligned mode.
* For unaligned mode, we store the offset in the upper 16-bits of the address.
* For aligned mode, we simply add the offset to the address.
*/
static inline u64 xsk_umem_adjust_offset(struct xdp_umem *umem, u64 address,
u64 offset)
{
if (umem->flags & XDP_UMEM_UNALIGNED_CHUNK_FLAG)
return address + (offset << XSK_UNALIGNED_BUF_OFFSET_SHIFT);
else
return address + offset;
}
static inline u32 xsk_umem_xdp_frame_sz(struct xdp_umem *umem)
{
return umem->chunk_size_nohr;
}
#else
static inline bool xsk_umem_has_addrs(struct xdp_umem *umem, u32 cnt)
{
return false;
}
static inline u64 *xsk_umem_peek_addr(struct xdp_umem *umem, u64 *addr)
{
return NULL;
}
static inline void xsk_umem_release_addr(struct xdp_umem *umem)
{
}
static inline void xsk_umem_complete_tx(struct xdp_umem *umem, u32 nb_entries)
{
}
static inline bool xsk_umem_consume_tx(struct xdp_umem *umem,
struct xdp_desc *desc)
{
return false;
}
static inline void xsk_umem_consume_tx_done(struct xdp_umem *umem)
{
}
static inline struct xdp_umem_fq_reuse *xsk_reuseq_prepare(u32 nentries)
{
return NULL;
}
static inline struct xdp_umem_fq_reuse *xsk_reuseq_swap(
struct xdp_umem *umem, struct xdp_umem_fq_reuse *newq)
{
return NULL;
}
static inline void xsk_reuseq_free(struct xdp_umem_fq_reuse *rq)
{
}
static inline struct xdp_umem *xdp_get_umem_from_qid(struct net_device *dev,
u16 queue_id)
{
return NULL;
}
static inline char *xdp_umem_get_data(struct xdp_umem *umem, u64 addr)
{
return NULL;
}
static inline dma_addr_t xdp_umem_get_dma(struct xdp_umem *umem, u64 addr)
{
return 0;
}
static inline bool xsk_umem_has_addrs_rq(struct xdp_umem *umem, u32 cnt)
{
return false;
}
static inline u64 *xsk_umem_peek_addr_rq(struct xdp_umem *umem, u64 *addr)
{
return NULL;
}
static inline void xsk_umem_release_addr_rq(struct xdp_umem *umem)
{
}
static inline void xsk_umem_fq_reuse(struct xdp_umem *umem, u64 addr)
{
}
static inline void xsk_set_rx_need_wakeup(struct xdp_umem *umem)
{
}
static inline void xsk_set_tx_need_wakeup(struct xdp_umem *umem)
{
}
static inline void xsk_clear_rx_need_wakeup(struct xdp_umem *umem)
{
}
static inline void xsk_clear_tx_need_wakeup(struct xdp_umem *umem)
{
}
static inline bool xsk_umem_uses_need_wakeup(struct xdp_umem *umem)
{
return false;
}
static inline u64 xsk_umem_adjust_offset(struct xdp_umem *umem, u64 handle,
u64 offset)
{
return 0;
}
static inline u32 xsk_umem_xdp_frame_sz(struct xdp_umem *umem)
{
return 0;
}
#endif /* CONFIG_XDP_SOCKETS */
#endif /* _LINUX_XDP_SOCK_DRV_H */
|
