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
|
#define _GNU_SOURCE
#include "main.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <malloc.h>
#include <assert.h>
#include <errno.h>
#include <limits.h>
#define SMP_CACHE_BYTES 64
#define cache_line_size() SMP_CACHE_BYTES
#define ____cacheline_aligned_in_smp __attribute__ ((aligned (SMP_CACHE_BYTES)))
#define unlikely(x) (__builtin_expect(!!(x), 0))
#define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a))
typedef pthread_spinlock_t spinlock_t;
typedef int gfp_t;
static void *kmalloc(unsigned size, gfp_t gfp)
{
return memalign(64, size);
}
static void *kzalloc(unsigned size, gfp_t gfp)
{
void *p = memalign(64, size);
if (!p)
return p;
memset(p, 0, size);
return p;
}
static void kfree(void *p)
{
if (p)
free(p);
}
static void spin_lock_init(spinlock_t *lock)
{
int r = pthread_spin_init(lock, 0);
assert(!r);
}
static void spin_lock(spinlock_t *lock)
{
int ret = pthread_spin_lock(lock);
assert(!ret);
}
static void spin_unlock(spinlock_t *lock)
{
int ret = pthread_spin_unlock(lock);
assert(!ret);
}
static void spin_lock_bh(spinlock_t *lock)
{
spin_lock(lock);
}
static void spin_unlock_bh(spinlock_t *lock)
{
spin_unlock(lock);
}
static void spin_lock_irq(spinlock_t *lock)
{
spin_lock(lock);
}
static void spin_unlock_irq(spinlock_t *lock)
{
spin_unlock(lock);
}
static void spin_lock_irqsave(spinlock_t *lock, unsigned long f)
{
spin_lock(lock);
}
static void spin_unlock_irqrestore(spinlock_t *lock, unsigned long f)
{
spin_unlock(lock);
}
#include "../../../include/linux/ptr_ring.h"
static unsigned long long headcnt, tailcnt;
static struct ptr_ring array ____cacheline_aligned_in_smp;
/* implemented by ring */
void alloc_ring(void)
{
int ret = ptr_ring_init(&array, ring_size, 0);
assert(!ret);
}
/* guest side */
int add_inbuf(unsigned len, void *buf, void *datap)
{
int ret;
ret = __ptr_ring_produce(&array, buf);
if (ret >= 0) {
ret = 0;
headcnt++;
}
return ret;
}
/*
* ptr_ring API provides no way for producer to find out whether a given
* buffer was consumed. Our tests merely require that a successful get_buf
* implies that add_inbuf succeed in the past, and that add_inbuf will succeed,
* fake it accordingly.
*/
void *get_buf(unsigned *lenp, void **bufp)
{
void *datap;
if (tailcnt == headcnt || __ptr_ring_full(&array))
datap = NULL;
else {
datap = "Buffer\n";
++tailcnt;
}
return datap;
}
void poll_used(void)
{
void *b;
do {
if (tailcnt == headcnt || __ptr_ring_full(&array)) {
b = NULL;
barrier();
} else {
b = "Buffer\n";
}
} while (!b);
}
void disable_call()
{
assert(0);
}
bool enable_call()
{
assert(0);
}
void kick_available(void)
{
assert(0);
}
/* host side */
void disable_kick()
{
assert(0);
}
bool enable_kick()
{
assert(0);
}
void poll_avail(void)
{
void *b;
do {
barrier();
b = __ptr_ring_peek(&array);
} while (!b);
}
bool use_buf(unsigned *lenp, void **bufp)
{
void *ptr;
ptr = __ptr_ring_consume(&array);
return ptr;
}
void call_used(void)
{
assert(0);
}
|
