xref: /openbmc/linux/net/smc/smc_ib.h (revision be58f710)
1  /* SPDX-License-Identifier: GPL-2.0 */
2  /*
3   * Shared Memory Communications over RDMA (SMC-R) and RoCE
4   *
5   *  Definitions for IB environment
6   *
7   *  Copyright IBM Corp. 2016
8   *
9   *  Author(s):  Ursula Braun <Ursula Braun@linux.vnet.ibm.com>
10   */
11  
12  #ifndef _SMC_IB_H
13  #define _SMC_IB_H
14  
15  #include <linux/interrupt.h>
16  #include <linux/if_ether.h>
17  #include <linux/mutex.h>
18  #include <linux/wait.h>
19  #include <rdma/ib_verbs.h>
20  #include <net/smc.h>
21  
22  #define SMC_MAX_PORTS			2	/* Max # of ports */
23  #define SMC_GID_SIZE			sizeof(union ib_gid)
24  
25  #define SMC_IB_MAX_SEND_SGE		2
26  
27  struct smc_ib_devices {			/* list of smc ib devices definition */
28  	struct list_head	list;
29  	struct mutex		mutex;	/* protects list of smc ib devices */
30  };
31  
32  extern struct smc_ib_devices	smc_ib_devices; /* list of smc ib devices */
33  extern struct smc_lgr_list smc_lgr_list; /* list of linkgroups */
34  
35  struct smc_ib_device {				/* ib-device infos for smc */
36  	struct list_head	list;
37  	struct ib_device	*ibdev;
38  	struct ib_port_attr	pattr[SMC_MAX_PORTS];	/* ib dev. port attrs */
39  	struct ib_event_handler	event_handler;	/* global ib_event handler */
40  	struct ib_cq		*roce_cq_send;	/* send completion queue */
41  	struct ib_cq		*roce_cq_recv;	/* recv completion queue */
42  	struct tasklet_struct	send_tasklet;	/* called by send cq handler */
43  	struct tasklet_struct	recv_tasklet;	/* called by recv cq handler */
44  	char			mac[SMC_MAX_PORTS][ETH_ALEN];
45  						/* mac address per port*/
46  	u8			pnetid[SMC_MAX_PORTS][SMC_MAX_PNETID_LEN];
47  						/* pnetid per port */
48  	bool			pnetid_by_user[SMC_MAX_PORTS];
49  						/* pnetid defined by user? */
50  	u8			initialized : 1; /* ib dev CQ, evthdl done */
51  	struct work_struct	port_event_work;
52  	unsigned long		port_event_mask;
53  	DECLARE_BITMAP(ports_going_away, SMC_MAX_PORTS);
54  	atomic_t		lnk_cnt;	/* number of links on ibdev */
55  	wait_queue_head_t	lnks_deleted;	/* wait 4 removal of all links*/
56  	struct mutex		mutex;		/* protect dev setup+cleanup */
57  	atomic_t		lnk_cnt_by_port[SMC_MAX_PORTS];
58  						/* number of links per port */
59  	int			ndev_ifidx[SMC_MAX_PORTS]; /* ndev if indexes */
60  };
61  
62  struct smc_buf_desc;
63  struct smc_link;
64  
65  void smc_ib_ndev_change(struct net_device *ndev, unsigned long event);
66  int smc_ib_register_client(void) __init;
67  void smc_ib_unregister_client(void);
68  bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
69  int smc_ib_buf_map_sg(struct smc_link *lnk,
70  		      struct smc_buf_desc *buf_slot,
71  		      enum dma_data_direction data_direction);
72  void smc_ib_buf_unmap_sg(struct smc_link *lnk,
73  			 struct smc_buf_desc *buf_slot,
74  			 enum dma_data_direction data_direction);
75  void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
76  int smc_ib_create_protection_domain(struct smc_link *lnk);
77  void smc_ib_destroy_queue_pair(struct smc_link *lnk);
78  int smc_ib_create_queue_pair(struct smc_link *lnk);
79  int smc_ib_ready_link(struct smc_link *lnk);
80  int smc_ib_modify_qp_rts(struct smc_link *lnk);
81  int smc_ib_modify_qp_reset(struct smc_link *lnk);
82  long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
83  int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
84  			     struct smc_buf_desc *buf_slot, u8 link_idx);
85  void smc_ib_put_memory_region(struct ib_mr *mr);
86  void smc_ib_sync_sg_for_cpu(struct smc_link *lnk,
87  			    struct smc_buf_desc *buf_slot,
88  			    enum dma_data_direction data_direction);
89  void smc_ib_sync_sg_for_device(struct smc_link *lnk,
90  			       struct smc_buf_desc *buf_slot,
91  			       enum dma_data_direction data_direction);
92  int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport,
93  			 unsigned short vlan_id, u8 gid[], u8 *sgid_index);
94  bool smc_ib_is_valid_local_systemid(void);
95  int smcr_nl_get_device(struct sk_buff *skb, struct netlink_callback *cb);
96  #endif
97