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#ifndef _SPL_KMEM_H
#define _SPL_KMEM_H
#ifdef __cplusplus
extern "C" {
#endif
#undef DEBUG_KMEM
#undef DEBUG_KMEM_UNIMPLEMENTED
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
/*
* Memory allocation interfaces
*/
#define KM_SLEEP GFP_KERNEL
#define KM_NOSLEEP GFP_ATOMIC
#undef KM_PANIC /* No linux analog */
#define KM_PUSHPAGE (GFP_KERNEL | GFP_HIGH)
#define KM_VMFLAGS GFP_LEVEL_MASK
#define KM_FLAGS __GFP_BITS_MASK
#ifdef DEBUG_KMEM
/* Shim layer memory accounting */
extern atomic_t kmem_alloc_used;
extern unsigned int kmem_alloc_max;
#endif
#ifdef DEBUG_KMEM
#define __kmem_alloc(size, flags, allocator) \
({ void *_ptr_; \
\
/* Marked unlikely because we should never be doing this */ \
if (unlikely((size) > (PAGE_SIZE * 2))) \
printk("Warning: kmem_alloc(%d, 0x%x) large alloc at %s:%d " \
"(%d/%d)\n", (int)(size), (int)(flags), \
__FILE__, __LINE__, \
atomic_read(&kmem_alloc_used), kmem_alloc_max); \
\
_ptr_ = (void *)allocator((size), (flags)); \
if (_ptr_ == NULL) { \
printk("Warning: kmem_alloc(%d, 0x%x) failed at %s:%d " \
"(%d/%d)\n", (int)(size), (int)(flags), \
__FILE__, __LINE__, \
atomic_read(&kmem_alloc_used), kmem_alloc_max); \
atomic_add((size), &kmem_alloc_used); \
if (unlikely(atomic_read(&kmem_alloc_used) > kmem_alloc_max)) \
kmem_alloc_max = atomic_read(&kmem_alloc_used); \
} \
\
_ptr_; \
})
#define kmem_alloc(size, flags) __kmem_alloc(size, flags, kmalloc)
#define kmem_zalloc(size, flags) __kmem_alloc(size, flags, kzalloc)
#define kmem_free(ptr, size) \
({ \
BUG_ON(!ptr); \
atomic_sub((size), &kmem_alloc_used); \
memset(ptr, 0x5a, (size)); /* Poison */ \
kfree(ptr); \
(ptr) = (void *)0xdeadbeef; \
})
#else
#define kmem_alloc(size, flags) kmalloc(size, flags)
#define kmem_zalloc(size, flags) kzalloc(size, flags)
#define kmem_free(ptr, size) kfree(ptr)
#endif /* DEBUG_KMEM */
#ifdef DEBUG_KMEM_UNIMPLEMENTED
static __inline__ void *
kmem_alloc_tryhard(size_t size, size_t *alloc_size, int kmflags)
{
#error "kmem_alloc_tryhard() not implemented"
}
#endif /* DEBUG_KMEM_UNIMPLEMENTED */
/*
* Slab allocation interfaces
*/
#undef KMC_NOTOUCH /* No linux analog */
#define KMC_NODEBUG 0x00000000 /* Default beahvior */
#define KMC_NOMAGAZINE /* No linux analog */
#define KMC_NOHASH /* No linux analog */
#define KMC_QCACHE /* No linux analog */
#define KMC_REAP_CHUNK 256
#define KMC_DEFAULT_SEEKS DEFAULT_SEEKS
/* Defined by linux slab.h
* typedef struct kmem_cache_s kmem_cache_t;
*/
/* No linux analog
* extern int kmem_ready;
* extern pgcnt_t kmem_reapahead;
*/
#ifdef DEBUG_KMEM_UNIMPLEMENTED
static __inline__ void kmem_init(void) {
#error "kmem_init() not implemented"
}
static __inline__ void kmem_thread_init(void) {
#error "kmem_thread_init() not implemented"
}
static __inline__ void kmem_mp_init(void) {
#error "kmem_mp_init() not implemented"
}
static __inline__ void kmem_reap_idspace(void) {
#error "kmem_reap_idspace() not implemented"
}
static __inline__ size_t kmem_avail(void) {
#error "kmem_avail() not implemented"
}
static __inline__ size_t kmem_maxavail(void) {
#error "kmem_maxavail() not implemented"
}
static __inline__ uint64_t kmem_cache_stat(kmem_cache_t *cache) {
#error "kmem_cache_stat() not implemented"
}
#endif /* DEBUG_KMEM_UNIMPLEMENTED */
/* XXX - Used by arc.c to adjust its memory footprint. We may want
* to use this hook in the future to adjust behavior based on
* debug levels. For now it's safe to always return 0.
*/
static __inline__ int
kmem_debugging(void)
{
return 0;
}
typedef int (*kmem_constructor_t)(void *, void *, int);
typedef void (*kmem_destructor_t)(void *, void *);
typedef void (*kmem_reclaim_t)(void *);
extern kmem_cache_t *
__kmem_cache_create(char *name, size_t size, size_t align,
kmem_constructor_t constructor,
kmem_destructor_t destructor,
kmem_reclaim_t reclaim,
void *priv, void *vmp, int flags);
void
extern __kmem_cache_destroy(kmem_cache_t *cache);
void
extern __kmem_reap(void);
#define kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags) \
__kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags)
#define kmem_cache_destroy(cache) __kmem_cache_destroy(cache)
#define kmem_cache_alloc(cache, flags) kmem_cache_alloc(cache, flags)
#define kmem_cache_free(cache, ptr) kmem_cache_free(cache, ptr)
#define kmem_cache_reap_now(cache) kmem_cache_shrink(cache)
#define kmem_reap() __kmem_reap()
#ifdef __cplusplus
}
#endif
#endif /* _SPL_KMEM_H */
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