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authorUrsula Braun <ubraun@linux.ibm.com>2020-09-26 12:44:24 +0200
committerDavid S. Miller <davem@davemloft.net>2020-09-28 15:19:02 -0700
commit201091ebb2a161a0e10aab36186690b332941f6a (patch)
tree39b87ea12d877c20b462137ad831b50bd4591236 /net/smc
parent3fc6493761372c5f6ff84d407c58948b8f2ee360 (diff)
net/smc: introduce System Enterprise ID (SEID)
SMCD version 2 defines a System Enterprise ID (short SEID). This patch contains the SEID creation and adds the callback to retrieve the created SEID. 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>
Diffstat (limited to 'net/smc')
-rw-r--r--net/smc/af_smc.c2
-rw-r--r--net/smc/smc_ism.c21
-rw-r--r--net/smc/smc_ism.h7
3 files changed, 28 insertions, 2 deletions
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index dc0049b25bd9..8c1cde36adb8 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -2137,6 +2137,8 @@ static int __init smc_init(void)
if (rc)
return rc;
+ smc_ism_init();
+
rc = smc_pnet_init();
if (rc)
goto out_pernet_subsys;
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index 998c525de785..63c3dd5578bf 100644
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -21,7 +21,9 @@ struct smcd_dev_list smcd_dev_list = {
.mutex = __MUTEX_INITIALIZER(smcd_dev_list.mutex)
};
-/* Test if an ISM communication is possible. */
+bool smc_ism_v2_capable;
+
+/* Test if an ISM communication is possible - same CPC */
int smc_ism_cantalk(u64 peer_gid, unsigned short vlan_id, struct smcd_dev *smcd)
{
return smcd->ops->query_remote_gid(smcd, peer_gid, vlan_id ? 1 : 0,
@@ -39,6 +41,11 @@ int smc_ism_write(struct smcd_dev *smcd, const struct smc_ism_position *pos,
return rc < 0 ? rc : 0;
}
+void smc_ism_get_system_eid(struct smcd_dev *smcd, u8 **eid)
+{
+ smcd->ops->get_system_eid(smcd, eid);
+}
+
/* Set a connection using this DMBE. */
void smc_ism_set_conn(struct smc_connection *conn)
{
@@ -319,6 +326,13 @@ EXPORT_SYMBOL_GPL(smcd_alloc_dev);
int smcd_register_dev(struct smcd_dev *smcd)
{
mutex_lock(&smcd_dev_list.mutex);
+ if (list_empty(&smcd_dev_list.list)) {
+ u8 *system_eid = NULL;
+
+ smc_ism_get_system_eid(smcd, &system_eid);
+ if ((*system_eid) + 24 != '0' || (*system_eid) + 28 != '0')
+ smc_ism_v2_capable = true;
+ }
list_add_tail(&smcd->list, &smcd_dev_list.list);
mutex_unlock(&smcd_dev_list.mutex);
@@ -399,3 +413,8 @@ void smcd_handle_irq(struct smcd_dev *smcd, unsigned int dmbno)
spin_unlock_irqrestore(&smcd->lock, flags);
}
EXPORT_SYMBOL_GPL(smcd_handle_irq);
+
+void __init smc_ism_init(void)
+{
+ smc_ism_v2_capable = false;
+}
diff --git a/net/smc/smc_ism.h b/net/smc/smc_ism.h
index 81cc4537efd3..816d86361e1a 100644
--- a/net/smc/smc_ism.h
+++ b/net/smc/smc_ism.h
@@ -19,7 +19,10 @@ struct smcd_dev_list { /* List of SMCD devices */
struct mutex mutex; /* Protects list of devices */
};
-extern struct smcd_dev_list smcd_dev_list; /* list of smcd 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;
@@ -47,4 +50,6 @@ 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);
+void smc_ism_init(void);
#endif