diff mbox series

[net-next,v6,05/11] net/smc: mark optional smcd_ops and check for support when called

Message ID 20240414040304.54255-6-guwen@linux.alibaba.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series net/smc: SMC intra-OS shortcut with loopback-ism | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 926 this patch: 926
netdev/build_tools success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 10 of 10 maintainers
netdev/build_clang success Errors and warnings before: 937 this patch: 937
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 937 this patch: 937
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 59 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-04-15--15-00 (tests: 961)

Commit Message

Wen Gu April 14, 2024, 4:02 a.m. UTC 
Some operations are not supported by new introduced Emulated-ISM, so
mark them as optional and check if the device supports them when called.

Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
---
 include/net/smc.h | 14 ++++++++------
 net/smc/smc_ism.c |  9 ++++++++-
 2 files changed, 16 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/include/net/smc.h b/include/net/smc.h
index 542d12372c18..33b753115e43 100644
--- a/include/net/smc.h
+++ b/include/net/smc.h
@@ -59,12 +59,6 @@  struct smcd_ops {
 	int (*register_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb,
 			    void *client);
 	int (*unregister_dmb)(struct smcd_dev *dev, struct smcd_dmb *dmb);
-	int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
-	int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
-	int (*set_vlan_required)(struct smcd_dev *dev);
-	int (*reset_vlan_required)(struct smcd_dev *dev);
-	int (*signal_event)(struct smcd_dev *dev, struct smcd_gid *rgid,
-			    u32 trigger_irq, u32 event_code, u64 info);
 	int (*move_data)(struct smcd_dev *dev, u64 dmb_tok, unsigned int idx,
 			 bool sf, unsigned int offset, void *data,
 			 unsigned int size);
@@ -72,6 +66,14 @@  struct smcd_ops {
 	void (*get_local_gid)(struct smcd_dev *dev, struct smcd_gid *gid);
 	u16 (*get_chid)(struct smcd_dev *dev);
 	struct device* (*get_dev)(struct smcd_dev *dev);
+
+	/* optional operations */
+	int (*add_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
+	int (*del_vlan_id)(struct smcd_dev *dev, u64 vlan_id);
+	int (*set_vlan_required)(struct smcd_dev *dev);
+	int (*reset_vlan_required)(struct smcd_dev *dev);
+	int (*signal_event)(struct smcd_dev *dev, struct smcd_gid *rgid,
+			    u32 trigger_irq, u32 event_code, u64 info);
 };
 
 struct smcd_dev {
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index 051726586730..36459a3c739d 100644
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -126,6 +126,8 @@  int smc_ism_get_vlan(struct smcd_dev *smcd, unsigned short vlanid)
 
 	if (!vlanid)			/* No valid vlan id */
 		return -EINVAL;
+	if (!smcd->ops->add_vlan_id)
+		return -EOPNOTSUPP;
 
 	/* create new vlan entry, in case we need it */
 	new_vlan = kzalloc(sizeof(*new_vlan), GFP_KERNEL);
@@ -171,6 +173,8 @@  int smc_ism_put_vlan(struct smcd_dev *smcd, unsigned short vlanid)
 
 	if (!vlanid)			/* No valid vlan id */
 		return -EINVAL;
+	if (!smcd->ops->del_vlan_id)
+		return -EOPNOTSUPP;
 
 	spin_lock_irqsave(&smcd->lock, flags);
 	list_for_each_entry(vlan, &smcd->vlan, list) {
@@ -368,7 +372,8 @@  static void smcd_handle_sw_event(struct smc_ism_event_work *wrk)
 		smc_smcd_terminate(wrk->smcd, &peer_gid, ev_info.vlan_id);
 		break;
 	case ISM_EVENT_CODE_TESTLINK:	/* Activity timer */
-		if (ev_info.code == ISM_EVENT_REQUEST) {
+		if (ev_info.code == ISM_EVENT_REQUEST &&
+		    wrk->smcd->ops->signal_event) {
 			ev_info.code = ISM_EVENT_RESPONSE;
 			wrk->smcd->ops->signal_event(wrk->smcd,
 						     &peer_gid,
@@ -538,6 +543,8 @@  int smc_ism_signal_shutdown(struct smc_link_group *lgr)
 
 	if (lgr->peer_shutdown)
 		return 0;
+	if (!lgr->smcd->ops->signal_event)
+		return 0;
 
 	memcpy(ev_info.uid, lgr->id, SMC_LGR_ID_SIZE);
 	ev_info.vlan_id = lgr->vlan_id;