linux/net/smc/smc_ism.h
Ursula Braun 8caaccf521 net/smc: introduce CHID callback for ISM devices
With SMCD version 2 the CHIDs of ISM devices are needed for the
CLC handshake.
This patch provides the new callback to retrieve the CHID of an
ISM device.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-09-28 15:19:03 -07:00

57 lines
1.8 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/* Shared Memory Communications Direct over ISM devices (SMC-D)
*
* SMC-D ISM device structure definitions.
*
* Copyright IBM Corp. 2018
*/
#ifndef SMCD_ISM_H
#define SMCD_ISM_H
#include <linux/uio.h>
#include <linux/mutex.h>
#include "smc.h"
struct smcd_dev_list { /* List of SMCD devices */
struct list_head list;
struct mutex mutex; /* Protects list of devices */
};
extern struct smcd_dev_list smcd_dev_list; /* list of smcd devices */
extern bool smc_ism_v2_capable; /* HW supports ISM V2 and thus
* System EID is defined
*/
struct smc_ism_vlanid { /* VLAN id set on ISM device */
struct list_head list;
unsigned short vlanid; /* Vlan id */
refcount_t refcnt; /* Reference count */
};
struct smc_ism_position { /* ISM device position to write to */
u64 token; /* Token of DMB */
u32 offset; /* Offset into DMBE */
u8 index; /* Index of DMBE */
u8 signal; /* Generate interrupt on owner side */
};
struct smcd_dev;
int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *dev);
void smc_ism_set_conn(struct smc_connection *conn);
void smc_ism_unset_conn(struct smc_connection *conn);
int smc_ism_get_vlan(struct smcd_dev *dev, unsigned short vlan_id);
int smc_ism_put_vlan(struct smcd_dev *dev, unsigned short vlan_id);
int smc_ism_register_dmb(struct smc_link_group *lgr, int buf_size,
struct smc_buf_desc *dmb_desc);
int smc_ism_unregister_dmb(struct smcd_dev *dev, struct smc_buf_desc *dmb_desc);
int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos,
void *data, size_t len);
int smc_ism_signal_shutdown(struct smc_link_group *lgr);
void smc_ism_get_system_eid(struct smcd_dev *dev, u8 **eid);
u16 smc_ism_get_chid(struct smcd_dev *dev);
void smc_ism_init(void);
#endif