[RFC PATCH net-next v4 1/9] net/smc: Decouple ism_dev from SMC-D device dump

Wen Gu
2023-03-27T03:28:38Z

This patch helps to decouple SMC-D device and ISM device, allowing
different underlying device forms, such as non-PCI devices.

Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
---
include/net/smc.h | 1 +
net/smc/smc_ism.c | 6 +++---
2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/net/smc.h b/include/net/smc.h
index a002552..963ce9c 100644
--- a/include/net/smc.h
+++ b/include/net/smc.h
@@ -77,6 +77,7 @@ struct smcd_ops {
struct smcd_dev {
const struct smcd_ops *ops;
void *priv;
+ struct device *parent_pci_dev;
struct list_head list;
spinlock_t lock;
struct smc_connection **conn;
diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index fbee249..4249fb9 100644
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -231,11 +231,9 @@ static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
struct smc_pci_dev smc_pci_dev;
struct nlattr *port_attrs;
struct nlattr *attrs;
- struct ism_dev *ism;
int use_cnt = 0;
void *nlh;

- ism = smcd->priv;
nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
&smc_gen_nl_family, NLM_F_MULTI,
SMC_NETLINK_GET_DEV_SMCD);
@@ -250,7 +248,8 @@ static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
if (nla_put_u8(skb, SMC_NLA_DEV_IS_CRIT, use_cnt > 0))
goto errattr;
memset(&smc_pci_dev, 0, sizeof(smc_pci_dev));
- smc_set_pci_values(to_pci_dev(ism->dev.parent), &smc_pci_dev);
+ if (smcd->parent_pci_dev)
+ smc_set_pci_values(to_pci_dev(smcd->parent_pci_dev), &smc_pci_dev);
if (nla_put_u32(skb, SMC_NLA_DEV_PCI_FID, smc_pci_dev.pci_fid))
goto errattr;
if (nla_put_u16(skb, SMC_NLA_DEV_PCI_CHID, smc_pci_dev.pci_pchid))
@@ -420,6 +419,7 @@ static void smcd_register_dev(struct ism_dev *ism)
if (!smcd)
return;
smcd->priv = ism;
+ smcd->parent_pci_dev = ism->dev.parent;
ism_set_priv(ism, &smc_ism_client, smcd);
if (smc_pnetid_by_dev_port(&ism->pdev->dev, 0, smcd->pnetid))
smc_pnetid_by_table_smcd(smcd);
--
1.8.3.1