net/smc: change the term virtual ISM to Emulated-ISM

According to latest release of SMCv2.1[1], the term 'virtual ISM' has
been changed to 'Emulated-ISM' to avoid the ambiguity of the word
'virtual' in different contexts. So the names or comments in the code
need be modified accordingly.

[1] https://www.ibm.com/support/pages/node/7112343

Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Link: https://lore.kernel.org/r/20240205033317.127269-1-guwen@linux.alibaba.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Wen Gu

net/smc/af_smc.c

@@ -1045,7 +1045,7 @@ static int smc_find_ism_v2_device_clnt(struct smc_sock *smc,
 	int rc = SMC_CLC_DECL_NOSMCDDEV;
 	struct smcd_dev *smcd;
 	int i = 1, entry = 1;
-	bool is_virtual;
+	bool is_emulated;
 	u16 chid;
 
 	if (smcd_indicated(ini->smc_type_v1))
@@ -1057,12 +1057,12 @@ static int smc_find_ism_v2_device_clnt(struct smc_sock *smc,
 		chid = smc_ism_get_chid(smcd);
 		if (!smc_find_ism_v2_is_unique_chid(chid, ini, i))
 			continue;
-		is_virtual = __smc_ism_is_virtual(chid);
+		is_emulated = __smc_ism_is_emulated(chid);
 		if (!smc_pnet_is_pnetid_set(smcd->pnetid) ||
 		    smc_pnet_is_ndev_pnetid(sock_net(&smc->sk), smcd->pnetid)) {
-			if (is_virtual && entry == SMCD_CLC_MAX_V2_GID_ENTRIES)
+			if (is_emulated && entry == SMCD_CLC_MAX_V2_GID_ENTRIES)
 				/* It's the last GID-CHID entry left in CLC
-				 * Proposal SMC-Dv2 extension, but a virtual
+				 * Proposal SMC-Dv2 extension, but an Emulated-
 				 * ISM device will take two entries. So give
 				 * up it and try the next potential ISM device.
 				 */
@@ -1072,7 +1072,7 @@ static int smc_find_ism_v2_device_clnt(struct smc_sock *smc,
 			ini->is_smcd = true;
 			rc = 0;
 			i++;
-			entry = is_virtual ? entry + 2 : entry + 1;
+			entry = is_emulated ? entry + 2 : entry + 1;
 			if (entry > SMCD_CLC_MAX_V2_GID_ENTRIES)
 				break;
 		}
@@ -1413,10 +1413,10 @@ static int smc_connect_ism(struct smc_sock *smc,
 		if (rc)
 			return rc;
 
-		if (__smc_ism_is_virtual(ini->ism_chid[ini->ism_selected]))
+		if (__smc_ism_is_emulated(ini->ism_chid[ini->ism_selected]))
 			ini->ism_peer_gid[ini->ism_selected].gid_ext =
 						ntohll(aclc->d1.gid_ext);
-		/* for non-virtual ISM devices, peer gid_ext remains 0. */
+		/* for non-Emulated-ISM devices, peer gid_ext remains 0. */
 	}
 	ini->ism_peer_gid[ini->ism_selected].gid = ntohll(aclc->d0.gid);
 
@@ -2117,10 +2117,10 @@ static void smc_check_ism_v2_match(struct smc_init_info *ini,
 		if (smc_ism_get_chid(smcd) == proposed_chid &&
 		    !smc_ism_cantalk(proposed_gid, ISM_RESERVED_VLANID, smcd)) {
 			ini->ism_peer_gid[*matches].gid = proposed_gid->gid;
-			if (__smc_ism_is_virtual(proposed_chid))
+			if (__smc_ism_is_emulated(proposed_chid))
 				ini->ism_peer_gid[*matches].gid_ext =
 							proposed_gid->gid_ext;
-				/* non-virtual ISM's peer gid_ext remains 0. */
+				/* non-Emulated-ISM's peer gid_ext remains 0. */
 			ini->ism_dev[*matches] = smcd;
 			(*matches)++;
 			break;
@@ -2170,10 +2170,10 @@ static void smc_find_ism_v2_device_serv(struct smc_sock *new_smc,
 		smcd_gid.gid = ntohll(smcd_v2_ext->gidchid[i].gid);
 		smcd_gid.gid_ext = 0;
 		chid = ntohs(smcd_v2_ext->gidchid[i].chid);
-		if (__smc_ism_is_virtual(chid)) {
+		if (__smc_ism_is_emulated(chid)) {
 			if ((i + 1) == smc_v2_ext->hdr.ism_gid_cnt ||
 			    chid != ntohs(smcd_v2_ext->gidchid[i + 1].chid))
-				/* each virtual ISM device takes two GID-CHID
+				/* each Emulated-ISM device takes two GID-CHID
 				 * entries and CHID of the second entry repeats
 				 * that of the first entry.
 				 *

net/smc/smc.h

@@ -56,11 +56,11 @@ enum smc_state {		/* possible states of an SMC socket */
 };
 
 enum smc_supplemental_features {
-	SMC_SPF_VIRT_ISM_DEV	= 0,
+	SMC_SPF_EMULATED_ISM_DEV	= 0,
 };
 
 #define SMC_FEATURE_MASK \
-	(BIT(SMC_SPF_VIRT_ISM_DEV))
+	(BIT(SMC_SPF_EMULATED_ISM_DEV))
 
 struct smc_link_group;
 

net/smc/smc_clc.c

@@ -952,8 +952,8 @@ int smc_clc_send_proposal(struct smc_sock *smc, struct smc_init_info *ini)
 				gidchids[entry].chid =
 					htons(smc_ism_get_chid(ini->ism_dev[i]));
 				gidchids[entry].gid = htonll(smcd_gid.gid);
-				if (smc_ism_is_virtual(smcd)) {
-					/* a virtual ISM device takes two
+				if (smc_ism_is_emulated(smcd)) {
+					/* an Emulated-ISM device takes two
 					 * entries. CHID of the second entry
 					 * repeats that of the first entry.
 					 */
@@ -1055,7 +1055,7 @@ smcd_clc_prep_confirm_accept(struct smc_connection *conn,
 		clc->d1.chid = htons(chid);
 		if (eid && eid[0])
 			memcpy(clc->d1.eid, eid, SMC_MAX_EID_LEN);
-		if (__smc_ism_is_virtual(chid))
+		if (__smc_ism_is_emulated(chid))
 			clc->d1.gid_ext = htonll(smcd_gid.gid_ext);
 		len = SMCD_CLC_ACCEPT_CONFIRM_LEN_V2;
 		if (first_contact) {

net/smc/smc_clc.h

@@ -175,7 +175,7 @@ struct smc_clc_msg_proposal {	/* clc proposal message sent by Linux */
 #define SMCD_CLC_MAX_V2_GID_ENTRIES	8 /* max # of CHID-GID entries in CLC
 					   * proposal SMC-Dv2 extension.
 					   * each ISM device takes one entry and
-					   * each virtual ISM takes two entries.
+					   * each Emulated-ISM takes two entries
 					   */
 
 struct smc_clc_msg_proposal_area {

net/smc/smc_core.c

@@ -1535,7 +1535,7 @@ void smc_smcd_terminate(struct smcd_dev *dev, struct smcd_gid *peer_gid,
 	list_for_each_entry_safe(lgr, l, &dev->lgr_list, list) {
 		if ((!peer_gid->gid ||
 		     (lgr->peer_gid.gid == peer_gid->gid &&
-		      !smc_ism_is_virtual(dev) ? 1 :
+		      !smc_ism_is_emulated(dev) ? 1 :
 		      lgr->peer_gid.gid_ext == peer_gid->gid_ext)) &&
 		    (vlan == VLAN_VID_MASK || lgr->vlan_id == vlan)) {
 			if (peer_gid->gid) /* peer triggered termination */
@@ -1881,7 +1881,7 @@ static bool smcd_lgr_match(struct smc_link_group *lgr,
 	    lgr->smcd != smcismdev)
 		return false;
 
-	if (smc_ism_is_virtual(smcismdev) &&
+	if (smc_ism_is_emulated(smcismdev) &&
 	    lgr->peer_gid.gid_ext != peer_gid->gid_ext)
 		return false;
 

net/smc/smc_ism.h

@@ -15,7 +15,7 @@
 
 #include "smc.h"
 
-#define SMC_VIRTUAL_ISM_CHID_MASK	0xFF00
+#define SMC_EMULATED_ISM_CHID_MASK	0xFF00
 #define SMC_ISM_IDENT_MASK		0x00FFFF
 
 struct smcd_dev_list {	/* List of SMCD devices */
@@ -66,22 +66,22 @@ static inline int smc_ism_write(struct smcd_dev *smcd, u64 dmb_tok,
 	return rc < 0 ? rc : 0;
 }
 
-static inline bool __smc_ism_is_virtual(u16 chid)
+static inline bool __smc_ism_is_emulated(u16 chid)
 {
 	/* CHIDs in range of 0xFF00 to 0xFFFF are reserved
-	 * for virtual ISM device.
+	 * for Emulated-ISM device.
 	 *
 	 * loopback-ism:	0xFFFF
 	 * virtio-ism:		0xFF00 ~ 0xFFFE
 	 */
 	return ((chid & 0xFF00) == 0xFF00);
 }
 
-static inline bool smc_ism_is_virtual(struct smcd_dev *smcd)
+static inline bool smc_ism_is_emulated(struct smcd_dev *smcd)
 {
 	u16 chid = smcd->ops->get_chid(smcd);
 
-	return __smc_ism_is_virtual(chid);
+	return __smc_ism_is_emulated(chid);
 }
 
 #endif