diff options
Diffstat (limited to 'net/smc/smc_loopback.h')
| -rw-r--r-- | net/smc/smc_loopback.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/net/smc/smc_loopback.h b/net/smc/smc_loopback.h new file mode 100644 index 000000000000..6dd4292dae56 --- /dev/null +++ b/net/smc/smc_loopback.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Shared Memory Communications Direct over loopback-ism device. + * + * SMC-D loopback-ism device structure definitions. + * + * Copyright (c) 2024, Alibaba Inc. + * + * Author: Wen Gu <guwen@linux.alibaba.com> + * Tony Lu <tonylu@linux.alibaba.com> + * + */ + +#ifndef _SMC_LOOPBACK_H +#define _SMC_LOOPBACK_H + +#include <linux/device.h> +#include <linux/err.h> +#include <net/smc.h> + +#if IS_ENABLED(CONFIG_SMC_LO) +#define SMC_LO_MAX_DMBS 5000 +#define SMC_LO_DMBS_HASH_BITS 12 +#define SMC_LO_RESERVED_CHID 0xFFFF + +struct smc_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 smc_lo_dev { + struct smcd_dev *smcd; + struct device dev; + u16 chid; + struct smcd_gid local_gid; + atomic_t dmb_cnt; + rwlock_t dmb_ht_lock; + DECLARE_BITMAP(sba_idx_mask, SMC_LO_MAX_DMBS); + DECLARE_HASHTABLE(dmb_ht, SMC_LO_DMBS_HASH_BITS); + wait_queue_head_t ldev_release; +}; + +int smc_loopback_init(void); +void smc_loopback_exit(void); +#else +static inline int smc_loopback_init(void) +{ + return 0; +} + +static inline void smc_loopback_exit(void) +{ +} +#endif + +#endif /* _SMC_LOOPBACK_H */ |