[linux-block.git] / include / net / smc.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  Shared Memory Communications over RDMA (SMC-R) and RoCE
 *
 *  Definitions for the SMC module (socket related)
 *
 *  Copyright IBM Corp. 2016
 *
 *  Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
 */
#ifndef _SMC_H
#define _SMC_H

#include <linux/device.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/wait.h>
#include "linux/ism.h"

struct sock;

#define SMC_MAX_PNETID_LEN	16	/* Max. length of PNET id */

struct smc_hashinfo {
	rwlock_t lock;
	struct hlist_head ht;
};

int smc_hash_sk(struct sock *sk);
void smc_unhash_sk(struct sock *sk);

/* SMCD/ISM device driver interface */
struct smcd_dmb {
	u64 dmb_tok;
	u64 rgid;
	u32 dmb_len;
	u32 sba_idx;
	u32 vlan_valid;
	u32 vlan_id;
	void *cpu_addr;
	dma_addr_t dma_addr;
};

#define ISM_EVENT_DMB	0
#define ISM_EVENT_GID	1
#define ISM_EVENT_SWR	2

#define ISM_RESERVED_VLANID	0x1FFF

#define ISM_ERROR	0xFFFF

struct smcd_dev;
struct ism_client;

struct smcd_ops {
	int (*query_remote_gid)(struct smcd_dev *dev, u64 rgid, u32 vid_valid,
				u32 vid);
	int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb,
			    struct ism_client *client);
	int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
	int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
	int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
	int (*set_vlan_required)(struct smcd_dev *dev);
	int (*reset_vlan_required)(struct smcd_dev *dev);
	int (*signal_event)(struct smcd_dev *dev, u64 rgid, u32 trigger_irq,
			    u32 event_code, u64 info);
	int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx,
			 bool sf, unsigned int offset, void *data,
			 unsigned int size);
	int (*supports_v2)(void);
	u8* (*get_system_eid)(void);
	u64 (*get_local_gid)(struct smcd_dev *dev);
	u16 (*get_chid)(struct smcd_dev *dev);
	struct device* (*get_dev)(struct smcd_dev *dev);
};

struct smcd_dev {
	const struct smcd_ops *ops;
	void *priv;
	struct list_head list;
	spinlock_t lock;
	struct smc_connection **conn;
	struct list_head vlan;
	struct workqueue_struct *event_wq;
	u8 pnetid[SMC_MAX_PNETID_LEN];
	bool pnetid_by_user;
	struct list_head lgr_list;
	spinlock_t lgr_lock;
	atomic_t lgr_cnt;
	wait_queue_head_t lgrs_deleted;
	u8 going_away : 1;
};

#endif	/* _SMC_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
f16a7dd5 UB	2	/*
	3	* Shared Memory Communications over RDMA (SMC-R) and RoCE
	4	*
	5	* Definitions for the SMC module (socket related)
	6	*
	7	* Copyright IBM Corp. 2016
	8	*
	9	* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
	10	*/
	11	#ifndef _SMC_H
	12	#define _SMC_H
	13
949d6b40 JK	14	#include <linux/device.h>
	15	#include <linux/spinlock.h>
	16	#include <linux/types.h>
	17	#include <linux/wait.h>
89e7d2ba	18	#include "linux/ism.h"
949d6b40 JK	19
	20	struct sock;
	21
0afff91c UB	22	#define SMC_MAX_PNETID_LEN 16 /* Max. length of PNET id */
0afff91c UB	23
f16a7dd5 UB	24	struct smc_hashinfo {
	25	rwlock_t lock;
	26	struct hlist_head ht;
	27	};
	28
	29	int smc_hash_sk(struct sock *sk);
	30	void smc_unhash_sk(struct sock *sk);
c6ba7c9b HW	31
	32	/* SMCD/ISM device driver interface */
	33	struct smcd_dmb {
	34	u64 dmb_tok;
	35	u64 rgid;
	36	u32 dmb_len;
	37	u32 sba_idx;
	38	u32 vlan_valid;
	39	u32 vlan_id;
	40	void *cpu_addr;
	41	dma_addr_t dma_addr;
	42	};
	43
	44	#define ISM_EVENT_DMB 0
	45	#define ISM_EVENT_GID 1
	46	#define ISM_EVENT_SWR 2
	47
201091eb UB	48	#define ISM_RESERVED_VLANID 0x1FFF
201091eb UB	49
42bfba9e UB	50	#define ISM_ERROR 0xFFFF
42bfba9e UB	51
c6ba7c9b	52	struct smcd_dev;
820f2100	53	struct ism_client;
c6ba7c9b HW	54
	55	struct smcd_ops {
	56	int (query_remote_gid)(struct smcd_dev dev, u64 rgid, u32 vid_valid,
	57	u32 vid);
820f2100 SR	58	int (register_dmb)(struct smcd_dev dev, struct smcd_dmb *dmb,
820f2100 SR	59	struct ism_client *client);
c6ba7c9b HW	60	int (unregister_dmb)(struct smcd_dev dev, struct smcd_dmb *dmb);
	61	int (add_vlan_id)(struct smcd_dev dev, u64 vlan_id);
	62	int (del_vlan_id)(struct smcd_dev dev, u64 vlan_id);
	63	int (set_vlan_required)(struct smcd_dev dev);
	64	int (reset_vlan_required)(struct smcd_dev dev);
	65	int (signal_event)(struct smcd_dev dev, u64 rgid, u32 trigger_irq,
	66	u32 event_code, u64 info);
	67	int (move_data)(struct smcd_dev dev, u64 dmb_tok, unsigned int idx,
	68	bool sf, unsigned int offset, void *data,
	69	unsigned int size);
f947568e	70	int (*supports_v2)(void);
0a2f4f98	71	u8* (*get_system_eid)(void);
9de4df7b	72	u64 (get_local_gid)(struct smcd_dev dev);
8caaccf5	73	u16 (get_chid)(struct smcd_dev dev);
8c81ba20	74	struct device* (get_dev)(struct smcd_dev dev);
c6ba7c9b HW	75	};
	76
	77	struct smcd_dev {
	78	const struct smcd_ops *ops;
c6ba7c9b	79	void *priv;
c6ba7c9b HW	80	struct list_head list;
	81	spinlock_t lock;
	82	struct smc_connection **conn;
	83	struct list_head vlan;
	84	struct workqueue_struct *event_wq;
1619f770	85	u8 pnetid[SMC_MAX_PNETID_LEN];
f3d74b22	86	bool pnetid_by_user;
a2351c5d	87	struct list_head lgr_list;
a0a62ee1	88	spinlock_t lgr_lock;
5edd6b9c UB	89	atomic_t lgr_cnt;
5edd6b9c UB	90	wait_queue_head_t lgrs_deleted;
c3d9494e	91	u8 going_away : 1;
c6ba7c9b HW	92	};
c6ba7c9b HW	93
f16a7dd5	94	#endif /* _SMC_H */