210 lines
3.5 KiB
C
210 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include "main.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <pthread.h>
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#include <malloc.h>
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#define SMP_CACHE_BYTES 64
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#define cache_line_size() SMP_CACHE_BYTES
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#define ____cacheline_aligned_in_smp __attribute__ ((aligned (SMP_CACHE_BYTES)))
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#define unlikely(x) (__builtin_expect(!!(x), 0))
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#define likely(x) (__builtin_expect(!!(x), 1))
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#define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a))
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#define SIZE_MAX (~(size_t)0)
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#define KMALLOC_MAX_SIZE SIZE_MAX
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#define BUG_ON(x) assert(x)
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typedef pthread_spinlock_t spinlock_t;
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typedef int gfp_t;
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#define __GFP_ZERO 0x1
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static void *kmalloc(unsigned size, gfp_t gfp)
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{
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void *p = memalign(64, size);
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if (!p)
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return p;
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if (gfp & __GFP_ZERO)
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memset(p, 0, size);
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return p;
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}
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static inline void *kzalloc(unsigned size, gfp_t flags)
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{
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return kmalloc(size, flags | __GFP_ZERO);
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}
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static inline void *kmalloc_array(size_t n, size_t size, gfp_t flags)
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{
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if (size != 0 && n > SIZE_MAX / size)
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return NULL;
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return kmalloc(n * size, flags);
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}
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static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
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{
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return kmalloc_array(n, size, flags | __GFP_ZERO);
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}
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static void kfree(void *p)
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{
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if (p)
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free(p);
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}
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#define kvmalloc_array kmalloc_array
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#define kvfree kfree
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static void spin_lock_init(spinlock_t *lock)
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{
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int r = pthread_spin_init(lock, 0);
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assert(!r);
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}
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static void spin_lock(spinlock_t *lock)
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{
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int ret = pthread_spin_lock(lock);
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assert(!ret);
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}
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static void spin_unlock(spinlock_t *lock)
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{
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int ret = pthread_spin_unlock(lock);
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assert(!ret);
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}
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static void spin_lock_bh(spinlock_t *lock)
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{
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spin_lock(lock);
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}
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static void spin_unlock_bh(spinlock_t *lock)
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{
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spin_unlock(lock);
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}
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static void spin_lock_irq(spinlock_t *lock)
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{
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spin_lock(lock);
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}
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static void spin_unlock_irq(spinlock_t *lock)
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{
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spin_unlock(lock);
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}
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static void spin_lock_irqsave(spinlock_t *lock, unsigned long f)
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{
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spin_lock(lock);
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}
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static void spin_unlock_irqrestore(spinlock_t *lock, unsigned long f)
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{
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spin_unlock(lock);
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}
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#include "../../../include/linux/ptr_ring.h"
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static unsigned long long headcnt, tailcnt;
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static struct ptr_ring array ____cacheline_aligned_in_smp;
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/* implemented by ring */
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void alloc_ring(void)
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{
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int ret = ptr_ring_init(&array, ring_size, 0);
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assert(!ret);
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/* Hacky way to poke at ring internals. Useful for testing though. */
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if (param)
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array.batch = param;
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}
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/* guest side */
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int add_inbuf(unsigned len, void *buf, void *datap)
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{
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int ret;
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ret = __ptr_ring_produce(&array, buf);
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if (ret >= 0) {
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ret = 0;
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headcnt++;
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}
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return ret;
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}
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/*
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* ptr_ring API provides no way for producer to find out whether a given
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* buffer was consumed. Our tests merely require that a successful get_buf
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* implies that add_inbuf succeed in the past, and that add_inbuf will succeed,
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* fake it accordingly.
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*/
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void *get_buf(unsigned *lenp, void **bufp)
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{
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void *datap;
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if (tailcnt == headcnt || __ptr_ring_full(&array))
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datap = NULL;
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else {
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datap = "Buffer\n";
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++tailcnt;
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}
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return datap;
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}
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bool used_empty()
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{
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return (tailcnt == headcnt || __ptr_ring_full(&array));
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}
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void disable_call()
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{
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assert(0);
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}
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bool enable_call()
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{
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assert(0);
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}
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void kick_available(void)
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{
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assert(0);
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}
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/* host side */
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void disable_kick()
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{
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assert(0);
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}
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bool enable_kick()
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{
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assert(0);
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}
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bool avail_empty()
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{
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return __ptr_ring_empty(&array);
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}
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bool use_buf(unsigned *lenp, void **bufp)
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{
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void *ptr;
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ptr = __ptr_ring_consume(&array);
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return ptr;
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}
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void call_used(void)
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{
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assert(0);
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}
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