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// SPDX-License-Identifier: GPL-2.0
#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 likely(x) (__builtin_expect(!!(x), 1))
#define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a))
#define SIZE_MAX (~(size_t)0)
typedef pthread_spinlock_t spinlock_t;
typedef int gfp_t;
#define __GFP_ZERO 0x1
static void *kmalloc(unsigned size, gfp_t gfp)
{
void *p = memalign(64, size);
if (!p)
return p;
if (gfp & __GFP_ZERO)
memset(p, 0, size);
return p;
}
static inline void *kzalloc(unsigned size, gfp_t flags)
{
return kmalloc(size, flags | __GFP_ZERO);
}
static inline void *kmalloc_array(size_t n, size_t size, gfp_t flags)
{
if (size != 0 && n > SIZE_MAX / size)
return NULL;
return kmalloc(n * size, flags);
}
static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
{
return kmalloc_array(n, size, flags | __GFP_ZERO);
}
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);
/* Hacky way to poke at ring internals. Useful for testing though. */
if (param)
array.batch = param;
}
/* 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;
}
bool used_empty()
{
return (tailcnt == headcnt || __ptr_ring_full(&array));
}
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);
}
bool avail_empty()
{
return !__ptr_ring_peek(&array);
}
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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