/* 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); #else static inline int dibs_loopback_init(void) { return 0; } static inline void dibs_loopback_exit(void) { } #endif #endif /* _DIBS_LOOPBACK_H */