Commit 9fb6bc5b authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by David S. Miller

ptr_ring: ring test

Add ringtest based unit test for ptr ring.
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2e0ab8ca
all:
all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder
all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder ptr_ring
CFLAGS += -Wall
CFLAGS += -pthread -O2 -ggdb
......@@ -8,6 +8,7 @@ LDFLAGS += -pthread -O2 -ggdb
main.o: main.c main.h
ring.o: ring.c main.h
ptr_ring.o: ptr_ring.c main.h ../../../include/linux/ptr_ring.h
virtio_ring_0_9.o: virtio_ring_0_9.c main.h
virtio_ring_poll.o: virtio_ring_poll.c virtio_ring_0_9.c main.h
virtio_ring_inorder.o: virtio_ring_inorder.c virtio_ring_0_9.c main.h
......@@ -15,11 +16,13 @@ ring: ring.o main.o
virtio_ring_0_9: virtio_ring_0_9.o main.o
virtio_ring_poll: virtio_ring_poll.o main.o
virtio_ring_inorder: virtio_ring_inorder.o main.o
ptr_ring: ptr_ring.o main.o
clean:
-rm main.o
-rm ring.o ring
-rm virtio_ring_0_9.o virtio_ring_0_9
-rm virtio_ring_poll.o virtio_ring_poll
-rm virtio_ring_inorder.o virtio_ring_inorder
-rm ptr_ring.o ptr_ring
.PHONY: all clean
#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 *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);
}
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