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net/smc: Introduce explicit check for v2 support

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Previously, v2 support was derived from a very specific format of the SEID
as part of the SMC-D codebase. Make this part of the SMC-D device API, so
implementers do not need to adhere to a specific SEID format.

Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Reviewed-and-tested-by: Jan Karcher <jaka@linux.ibm.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Raspl 2023-03-13 11:10:31 +01:00 committed by David S. Miller
parent 45ef71d108
commit f947568e25
3 changed files with 9 additions and 1 deletions
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7
drivers/s390/net/ism_drv.c
View file

@ -842,6 +842,12 @@ static int smcd_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx,
return ism_move(smcd->priv, dmb_tok, idx, sf, offset, data, size);
}
static int smcd_supports_v2(void)
{
return SYSTEM_EID.serial_number[0] != '0' ||
SYSTEM_EID.type[0] != '0';
}
static u64 smcd_get_local_gid(struct smcd_dev *smcd)
{
return ism_get_local_gid(smcd->priv);
@ -869,6 +875,7 @@ static const struct smcd_ops ism_ops = {
.reset_vlan_required = smcd_reset_vlan_required,
.signal_event = smcd_signal_ieq,
.move_data = smcd_move,
.supports_v2 = smcd_supports_v2,
.get_system_eid = ism_get_seid,
.get_local_gid = smcd_get_local_gid,
.get_chid = smcd_get_chid,

1
include/net/smc.h
View file

@ -67,6 +67,7 @@ struct smcd_ops {
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);

2
net/smc/smc_ism.c
View file

@ -429,7 +429,7 @@ static void smcd_register_dev(struct ism_dev *ism)
u8 *system_eid = NULL;
system_eid = smcd->ops->get_system_eid();
if (system_eid[24] != '0' || system_eid[28] != '0') {
if (smcd->ops->supports_v2()) {
smc_ism_v2_capable = true;
memcpy(smc_ism_v2_system_eid, system_eid,
SMC_MAX_EID_LEN);