projects / thirdparty / kernel / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 46ac6441 WG |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* | |
| 3 | * Shared Memory Communications Direct over loopback-ism device. | |
| 4 | * | |
| 5 | * SMC-D loopback-ism device structure definitions. | |
| 6 | * | |
| 7 | * Copyright (c) 2024, Alibaba Inc. | |
| 8 | * | |
| 9 | * Author: Wen Gu <guwen@linux.alibaba.com> | |
| 10 | * Tony Lu <tonylu@linux.alibaba.com> | |
| 11 | * | |
| 12 | */ | |
| 13 | ||
| 14 | #ifndef _SMC_LOOPBACK_H | |
| 15 | #define _SMC_LOOPBACK_H | |
| 16 | ||
| 17 | #include <linux/device.h> | |
| 18 | #include <linux/err.h> | |
| 19 | #include <net/smc.h> | |
| 20 | ||
| 21 | #if IS_ENABLED(CONFIG_SMC_LO) | |
| 22 | #define SMC_LO_MAX_DMBS 5000 | |
| f7a22071 | 23 | #define SMC_LO_DMBS_HASH_BITS 12 |
| 45783ee8 | 24 | #define SMC_LO_RESERVED_CHID 0xFFFF |
| 46ac6441 | 25 | |
| f7a22071 WG |
26 | struct smc_lo_dmb_node { |
| 27 | struct hlist_node list; | |
| 28 | u64 token; | |
| 29 | u32 len; | |
| 30 | u32 sba_idx; | |
| 31 | void *cpu_addr; | |
| 32 | dma_addr_t dma_addr; | |
| c3a910f2 | 33 | refcount_t refcnt; |
| f7a22071 WG |
34 | }; |
| 35 | ||
| 46ac6441 WG |
36 | struct smc_lo_dev { |
| 37 | struct smcd_dev *smcd; | |
| 38 | struct device dev; | |
| 45783ee8 WG |
39 | u16 chid; |
| 40 | struct smcd_gid local_gid; | |
| c3a910f2 | 41 | atomic_t dmb_cnt; |
| f7a22071 WG |
42 | rwlock_t dmb_ht_lock; |
| 43 | DECLARE_BITMAP(sba_idx_mask, SMC_LO_MAX_DMBS); | |
| 44 | DECLARE_HASHTABLE(dmb_ht, SMC_LO_DMBS_HASH_BITS); | |
| c3a910f2 | 45 | wait_queue_head_t ldev_release; |
| 46ac6441 WG |
46 | }; |
| 47 | ||
| 48 | int smc_loopback_init(void); | |
| 49 | void smc_loopback_exit(void); | |
| 50 | #else | |
| 51 | static inline int smc_loopback_init(void) | |
| 52 | { | |
| 53 | return 0; | |
| 54 | } | |
| 55 | ||
| 56 | static inline void smc_loopback_exit(void) | |
| 57 | { | |
| 58 | } | |
| 59 | #endif | |
| 60 | ||
| 61 | #endif /* _SMC_LOOPBACK_H */ |