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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>
This commit is contained in:
Ursula Braun 2020-09-26 12:44:25 +02:00 committed by David S. Miller
parent 201091ebb2
commit 8caaccf521
6 changed files with 22 additions and 0 deletions
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12
drivers/s390/net/ism_drv.c
View File

@ -414,6 +414,17 @@ static void ism_get_system_eid(struct smcd_dev *smcd, u8 **eid)
*eid = &SYSTEM_EID.seid_string[0];
}
static u16 ism_get_chid(struct smcd_dev *smcd)
{
struct ism_dev *ismdev;
ismdev = (struct ism_dev *)smcd->priv;
if (!ismdev || !ismdev->pdev)
return 0;
return to_zpci(ismdev->pdev)->pchid;
}
static void ism_handle_event(struct ism_dev *ism)
{
struct smcd_event *entry;
@ -471,6 +482,7 @@ static const struct smcd_ops ism_ops = {
.signal_event = ism_signal_ieq,
.move_data = ism_move,
.get_system_eid = ism_get_system_eid,
.get_chid = ism_get_chid,
};
static int ism_dev_init(struct ism_dev *ism)

1
include/net/smc.h
View File

@ -66,6 +66,7 @@ struct smcd_ops {
bool sf, unsigned int offset, void *data,
unsigned int size);
void (*get_system_eid)(struct smcd_dev *dev, u8 **eid);
u16 (*get_chid)(struct smcd_dev *dev);
};
struct smcd_dev {

2
net/smc/af_smc.c
View File

@ -566,6 +566,8 @@ static int smc_find_ism_device(struct smc_sock *smc, struct smc_init_info *ini)
smc_pnet_find_ism_resource(smc->clcsock->sk, ini);
if (!ini->ism_dev[0])
return SMC_CLC_DECL_NOSMCDDEV;
else
ini->ism_chid[0] = smc_ism_get_chid(ini->ism_dev[0]);
return 0;
}

1
net/smc/smc_core.h
View File

@ -303,6 +303,7 @@ struct smc_init_info {
/* SMC-D */
u64 ism_peer_gid[SMC_MAX_ISM_DEVS + 1];
struct smcd_dev *ism_dev[SMC_MAX_ISM_DEVS + 1];
u16 ism_chid[SMC_MAX_ISM_DEVS + 1];
};
/* Find the connection associated with the given alert token in the link group.

5
net/smc/smc_ism.c
View File

@ -46,6 +46,11 @@ void smc_ism_get_system_eid(struct smcd_dev *smcd, u8 **eid)
smcd->ops->get_system_eid(smcd, eid);
}
u16 smc_ism_get_chid(struct smcd_dev *smcd)
{
return smcd->ops->get_chid(smcd);
}
/* Set a connection using this DMBE. */
void smc_ism_set_conn(struct smc_connection *conn)
{

1
net/smc/smc_ism.h
View File

@ -51,5 +51,6 @@ 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