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/* 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;
};
/* 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 smcd_gid {
u64 gid;
u64 gid_ext;
};
struct smcd_ops {
int (*query_remote_gid)(struct smcd_dev *dev, struct smcd_gid *rgid,
u32 vid_valid, u32 vid);
int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb,
void *client);
int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
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);
void (*get_local_gid)(struct smcd_dev *dev, struct smcd_gid *gid);
u16 (*get_chid)(struct smcd_dev *dev);
struct device* (*get_dev)(struct smcd_dev *dev);
/* optional operations */
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, struct smcd_gid *rgid,
u32 trigger_irq, u32 event_code, u64 info);
int (*support_dmb_nocopy)(struct smcd_dev *dev);
int (*attach_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
int (*detach_dmb)(struct smcd_dev *dev, u64 token);
};
struct smcd_dev {
const struct smcd_ops *ops;
void *priv;
void *client;
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 */
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