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#ifndef _SPL_KMEM_H
#define _SPL_KMEM_H
#ifdef __cplusplus
extern "C" {
#endif
#define DEBUG_KMEM
#undef DEBUG_KMEM_UNIMPLEMENTED
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
#include <linux/spinlock.h>
#include <sys/debug.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
extern atomic64_t kmem_alloc_used;
extern unsigned long kmem_alloc_max;
extern atomic64_t vmem_alloc_used;
extern unsigned long vmem_alloc_max;
extern int kmem_warning_flag;
#define __kmem_alloc(size, flags, allocator) \
({ void *_ptr_; \
\
/* Marked unlikely because we should never be doing this */ \
if (unlikely((size) > (PAGE_SIZE * 4)) && kmem_warning_flag) \
__CDEBUG_LIMIT(S_KMEM, D_WARNING, "Warning " \
"kmem_alloc(%d, 0x%x) large alloc at %s:%d " \
"(%ld/%ld)\n", (int)(size), (int)(flags), \
__FILE__, __LINE__, \
atomic64_read(&kmem_alloc_used), \
kmem_alloc_max); \
\
_ptr_ = (void *)allocator((size), (flags)); \
if (_ptr_ == NULL) { \
__CDEBUG_LIMIT(S_KMEM, D_WARNING, "Warning " \
"kmem_alloc(%d, 0x%x) failed at %s:%d " \
"(%ld/%ld)\n", (int)(size), (int)(flags), \
__FILE__, __LINE__, \
atomic64_read(&kmem_alloc_used), \
kmem_alloc_max); \
} else { \
atomic64_add((size), &kmem_alloc_used); \
if (unlikely(atomic64_read(&kmem_alloc_used)>kmem_alloc_max)) \
kmem_alloc_max = atomic64_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) \
({ \
ASSERT((ptr) || (size > 0)); \
atomic64_sub((size), &kmem_alloc_used); \
memset(ptr, 0x5a, (size)); /* Poison */ \
kfree(ptr); \
})
#define __vmem_alloc(size, flags) \
({ void *_ptr_; \
\
ASSERT(flags & KM_SLEEP); \
\
_ptr_ = (void *)__vmalloc((size), \
(((flags) | __GFP_HIGHMEM) & ~__GFP_ZERO), \
PAGE_KERNEL); \
if (_ptr_ == NULL) { \
__CDEBUG_LIMIT(S_KMEM, D_WARNING, "Warning " \
"vmem_alloc(%d, 0x%x) failed at %s:%d " \
"(%ld/%ld)\n", (int)(size), (int)(flags), \
__FILE__, __LINE__, \
atomic64_read(&vmem_alloc_used), \
vmem_alloc_max); \
} else { \
if (flags & __GFP_ZERO) \
memset(_ptr_, 0, (size)); \
\
atomic64_add((size), &vmem_alloc_used); \
if (unlikely(atomic64_read(&vmem_alloc_used)>vmem_alloc_max)) \
vmem_alloc_max = atomic64_read(&vmem_alloc_used); \
} \
\
_ptr_; \
})
#define vmem_alloc(size, flags) __vmem_alloc((size), (flags))
#define vmem_zalloc(size, flags) __vmem_alloc((size), ((flags) | \
__GFP_ZERO))
#define vmem_free(ptr, size) \
({ \
ASSERT((ptr) || (size > 0)); \
atomic64_sub((size), &vmem_alloc_used); \
memset(ptr, 0x5a, (size)); /* Poison */ \
vfree(ptr); \
})
#else
#define kmem_alloc(size, flags) kmalloc((size), (flags))
#define kmem_zalloc(size, flags) kzalloc((size), (flags))
#define kmem_free(ptr, size) \
({ \
ASSERT((ptr) || (size > 0)); \
kfree(ptr); \
})
#define vmem_alloc(size, flags) __vmalloc((size), ((flags) | \
__GFP_HIGHMEM), PAGE_KERNEL)
#define vmem_zalloc(size, flags) __vmalloc((size), ((flags) | \
__GFP_HIGHMEM | __GFP_ZERO) \
PAGE_KERNEL)
#define vmem_free(ptr, size) \
({ \
ASSERT((ptr) || (size > 0)); \
vfree(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 behavior */
#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 int kmem_set_warning(int flag);
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);
int
extern __kmem_cache_destroy(kmem_cache_t *cache);
void
extern __kmem_reap(void);
int kmem_init(void);
void kmem_fini(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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