netdev - [PATCH net-next v4 4/9] net/smc: introduce virtual ISM device support feature

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Date: Thu,  7 Dec 2023 11:49:49 +0800
From: Wen Gu <guwen@...ux.alibaba.com>
To: wintera@...ux.ibm.com,
	wenjia@...ux.ibm.com,
	hca@...ux.ibm.com,
	gor@...ux.ibm.com,
	agordeev@...ux.ibm.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	kgraul@...ux.ibm.com,
	jaka@...ux.ibm.com
Cc: borntraeger@...ux.ibm.com,
	svens@...ux.ibm.com,
	alibuda@...ux.alibaba.com,
	tonylu@...ux.alibaba.com,
	guwen@...ux.alibaba.com,
	raspl@...ux.ibm.com,
	schnelle@...ux.ibm.com,
	guangguan.wang@...ux.alibaba.com,
	linux-s390@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next v4 4/9] net/smc: introduce virtual ISM device support feature

This introduces virtual ISM device support feature to SMCv2.1 as the
first supplemental feature.

Signed-off-by: Wen Gu <guwen@...ux.alibaba.com>
---
 net/smc/af_smc.c | 2 ++
 net/smc/smc.h    | 9 ++++++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c
index 7fc2f3c..0c4f975 100644
--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -1520,6 +1520,7 @@ static int __smc_connect(struct smc_sock *smc)
 	ini->smcr_version = SMC_V1 | SMC_V2;
 	ini->smc_type_v1 = SMC_TYPE_B;
 	ini->smc_type_v2 = SMC_TYPE_B;
+	ini->feature_mask = SMC_FEATURE_MASK;
 
 	/* get vlan id from IP device */
 	if (smc_vlan_by_tcpsk(smc->clcsock, ini)) {
@@ -1985,6 +1986,7 @@ static int smc_listen_v2_check(struct smc_sock *new_smc,
 	ini->smc_type_v2 = pclc->hdr.typev2;
 	ini->smcd_version = smcd_indicated(ini->smc_type_v1) ? SMC_V1 : 0;
 	ini->smcr_version = smcr_indicated(ini->smc_type_v1) ? SMC_V1 : 0;
+	ini->feature_mask = SMC_FEATURE_MASK;
 	if (pclc->hdr.version > SMC_V1) {
 		if (smcd_indicated(ini->smc_type_v2))
 			ini->smcd_version |= SMC_V2;
diff --git a/net/smc/smc.h b/net/smc/smc.h
index 903b151..9929d1e 100644
--- a/net/smc/smc.h
+++ b/net/smc/smc.h
@@ -58,9 +58,12 @@ enum smc_state {		/* possible states of an SMC socket */
 	SMC_PROCESSABORT	= 27,
 };
 
-#define SMC_FEATURE_MASK	0	/* bitmask of
-					 * supported supplemental features
-					 */
+enum smc_supplemental_features {
+	SMC_SPF_VIRT_ISM_DEV	= 0,
+};
+
+#define SMC_FEATURE_MASK \
+	(BIT(SMC_SPF_VIRT_ISM_DEV))
 
 struct smc_link_group;
 
-- 
1.8.3.1