xref: /openbmc/linux/net/smc/smc_ib.h (revision 6aa7de05)
1 /*
2  * Shared Memory Communications over RDMA (SMC-R) and RoCE
3  *
4  *  Definitions for IB environment
5  *
6  *  Copyright IBM Corp. 2016
7  *
8  *  Author(s):  Ursula Braun <Ursula Braun@linux.vnet.ibm.com>
9  */
10 
11 #ifndef _SMC_IB_H
12 #define _SMC_IB_H
13 
14 #include <linux/interrupt.h>
15 #include <linux/if_ether.h>
16 #include <rdma/ib_verbs.h>
17 
18 #define SMC_MAX_PORTS			2	/* Max # of ports */
19 #define SMC_GID_SIZE			sizeof(union ib_gid)
20 
21 #define SMC_IB_MAX_SEND_SGE		2
22 
23 struct smc_ib_devices {			/* list of smc ib devices definition */
24 	struct list_head	list;
25 	spinlock_t		lock;	/* protects list of smc ib devices */
26 };
27 
28 extern struct smc_ib_devices	smc_ib_devices; /* list of smc ib devices */
29 
30 struct smc_ib_device {				/* ib-device infos for smc */
31 	struct list_head	list;
32 	struct ib_device	*ibdev;
33 	struct ib_port_attr	pattr[SMC_MAX_PORTS];	/* ib dev. port attrs */
34 	struct ib_event_handler	event_handler;	/* global ib_event handler */
35 	struct ib_cq		*roce_cq_send;	/* send completion queue */
36 	struct ib_cq		*roce_cq_recv;	/* recv completion queue */
37 	struct tasklet_struct	send_tasklet;	/* called by send cq handler */
38 	struct tasklet_struct	recv_tasklet;	/* called by recv cq handler */
39 	char			mac[SMC_MAX_PORTS][ETH_ALEN];
40 						/* mac address per port*/
41 	union ib_gid		gid[SMC_MAX_PORTS]; /* gid per port */
42 	u8			initialized : 1; /* ib dev CQ, evthdl done */
43 	struct work_struct	port_event_work;
44 	unsigned long		port_event_mask;
45 };
46 
47 struct smc_buf_desc;
48 struct smc_link;
49 
50 int smc_ib_register_client(void) __init;
51 void smc_ib_unregister_client(void);
52 bool smc_ib_port_active(struct smc_ib_device *smcibdev, u8 ibport);
53 int smc_ib_remember_port_attr(struct smc_ib_device *smcibdev, u8 ibport);
54 int smc_ib_buf_map_sg(struct smc_ib_device *smcibdev,
55 		      struct smc_buf_desc *buf_slot,
56 		      enum dma_data_direction data_direction);
57 void smc_ib_buf_unmap_sg(struct smc_ib_device *smcibdev,
58 			 struct smc_buf_desc *buf_slot,
59 			 enum dma_data_direction data_direction);
60 void smc_ib_dealloc_protection_domain(struct smc_link *lnk);
61 int smc_ib_create_protection_domain(struct smc_link *lnk);
62 void smc_ib_destroy_queue_pair(struct smc_link *lnk);
63 int smc_ib_create_queue_pair(struct smc_link *lnk);
64 int smc_ib_ready_link(struct smc_link *lnk);
65 int smc_ib_modify_qp_rts(struct smc_link *lnk);
66 int smc_ib_modify_qp_reset(struct smc_link *lnk);
67 long smc_ib_setup_per_ibdev(struct smc_ib_device *smcibdev);
68 int smc_ib_get_memory_region(struct ib_pd *pd, int access_flags,
69 			     struct smc_buf_desc *buf_slot);
70 void smc_ib_put_memory_region(struct ib_mr *mr);
71 void smc_ib_sync_sg_for_cpu(struct smc_ib_device *smcibdev,
72 			    struct smc_buf_desc *buf_slot,
73 			    enum dma_data_direction data_direction);
74 void smc_ib_sync_sg_for_device(struct smc_ib_device *smcibdev,
75 			       struct smc_buf_desc *buf_slot,
76 			       enum dma_data_direction data_direction);
77 #endif
78