net/smc: Refactor smc ism v2 capability handling
Encapsulate the smc ism v2 capability boolean value
in a function for better information hiding.
Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 13db3f2..f79b59a 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -668,7 +668,7 @@ static int smc_find_proposal_devices(struct smc_sock *smc,
ini->smc_type_v1 = SMC_TYPE_N;
} /* else RDMA is supported for this connection */
}
- if (smc_ism_v2_capable && smc_find_ism_v2_device_clnt(smc, ini))
+ if (smc_ism_is_v2_capable() && smc_find_ism_v2_device_clnt(smc, ini))
ini->smc_type_v2 = SMC_TYPE_N;
/* if neither ISM nor RDMA are supported, fallback */
@@ -920,7 +920,7 @@ static int smc_connect_check_aclc(struct smc_init_info *ini,
/* perform steps before actually connecting */
static int __smc_connect(struct smc_sock *smc)
{
- u8 version = smc_ism_v2_capable ? SMC_V2 : SMC_V1;
+ u8 version = smc_ism_is_v2_capable() ? SMC_V2 : SMC_V1;
struct smc_clc_msg_accept_confirm_v2 *aclc2;
struct smc_clc_msg_accept_confirm *aclc;
struct smc_init_info *ini = NULL;
@@ -945,9 +945,9 @@ static int __smc_connect(struct smc_sock *smc)
version);
ini->smcd_version = SMC_V1;
- ini->smcd_version |= smc_ism_v2_capable ? SMC_V2 : 0;
+ ini->smcd_version |= smc_ism_is_v2_capable() ? SMC_V2 : 0;
ini->smc_type_v1 = SMC_TYPE_B;
- ini->smc_type_v2 = smc_ism_v2_capable ? SMC_TYPE_D : SMC_TYPE_N;
+ ini->smc_type_v2 = smc_ism_is_v2_capable() ? SMC_TYPE_D : SMC_TYPE_N;
/* get vlan id from IP device */
if (smc_vlan_by_tcpsk(smc->clcsock, ini)) {
@@ -1355,7 +1355,7 @@ static int smc_listen_v2_check(struct smc_sock *new_smc,
rc = SMC_CLC_DECL_PEERNOSMC;
goto out;
}
- if (!smc_ism_v2_capable) {
+ if (!smc_ism_is_v2_capable()) {
ini->smcd_version &= ~SMC_V2;
rc = SMC_CLC_DECL_NOISM2SUPP;
goto out;
@@ -1681,7 +1681,7 @@ static void smc_listen_work(struct work_struct *work)
{
struct smc_sock *new_smc = container_of(work, struct smc_sock,
smc_listen_work);
- u8 version = smc_ism_v2_capable ? SMC_V2 : SMC_V1;
+ u8 version = smc_ism_is_v2_capable() ? SMC_V2 : SMC_V1;
struct socket *newclcsock = new_smc->clcsock;
struct smc_clc_msg_accept_confirm *cclc;
struct smc_clc_msg_proposal_area *buf;
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index 6abbdd0..2456ee82 100644
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -21,7 +21,7 @@ struct smcd_dev_list smcd_dev_list = {
.mutex = __MUTEX_INITIALIZER(smcd_dev_list.mutex)
};
-bool smc_ism_v2_capable;
+static 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)
@@ -51,6 +51,12 @@ u16 smc_ism_get_chid(struct smcd_dev *smcd)
return smcd->ops->get_chid(smcd);
}
+/* HW supports ISM V2 and thus System EID is defined */
+bool smc_ism_is_v2_capable(void)
+{
+ return smc_ism_v2_capable;
+}
+
/* Set a connection using this DMBE. */
void smc_ism_set_conn(struct smc_connection *conn)
{
diff --git a/net/smc/smc_ism.h b/net/smc/smc_ism.h
index 8048e09..481a4b7 100644
--- a/net/smc/smc_ism.h
+++ b/net/smc/smc_ism.h
@@ -10,6 +10,7 @@
#define SMCD_ISM_H
#include <linux/uio.h>
+#include <linux/types.h>
#include <linux/mutex.h>
#include "smc.h"
@@ -20,9 +21,6 @@ struct 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;
@@ -52,5 +50,6 @@ int smc_ism_write(struct smcd_dev *dev, const struct smc_ism_position *pos,
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);
+bool smc_ism_is_v2_capable(void);
void smc_ism_init(void);
#endif
