/* SPDX-License-Identifier: GPL-2.0 *//* *  dibs loopback (aka loopback-ism) device structure definitions. * *  Copyright (c) 2024, Alibaba Inc. * *  Author: Wen Gu <guwen@linux.alibaba.com> *          Tony Lu <tonylu@linux.alibaba.com> * */ #ifndef _DIBS_LOOPBACK_H#define _DIBS_LOOPBACK_H #include <linux/dibs.h>#include <linux/hashtable.h>#include <linux/spinlock.h>#include <linux/types.h>#include <linux/wait.h> #if IS_ENABLED(CONFIG_DIBS_LO)#define DIBS_LO_DMBS_HASH_BITS	12#define DIBS_LO_MAX_DMBS	5000 struct dibs_lo_dmb_node {	struct hlist_node list;	u64 token;	u32 len;	u32 sba_idx;	void *cpu_addr;	dma_addr_t dma_addr;	refcount_t refcnt;}; struct dibs_lo_dev {	struct dibs_dev *dibs;	atomic_t dmb_cnt;	rwlock_t dmb_ht_lock;	DECLARE_BITMAP(sba_idx_mask, DIBS_LO_MAX_DMBS);	DECLARE_HASHTABLE(dmb_ht, DIBS_LO_DMBS_HASH_BITS);	wait_queue_head_t ldev_release;}; int dibs_loopback_init(void);void dibs_loopback_exit(void);#elsestatic inline int dibs_loopback_init(void){	return 0;} static inline void dibs_loopback_exit(void){}#endif #endif /* _DIBS_LOOPBACK_H */