[PATCH v2 net-next 09/12] net: enetc: add CBDR setup/teardown hooks to enetc_si_ops for VF support

[Wei Fang]

The upcoming ENETC v4 VF will share the enetc-vf driver with the
existing v1 VF. However, ENETC v4 uses a revised CBDR (command BD ring)
setup/teardown API that differs from v1.

To support both versions in the same driver, add setup_cbdr() and
teardown_cbdr() function pointers to struct enetc_si_ops. This allows
each hardware version to register its own CBDR implementation:

- ENETC v1 VF registers enetc_setup_cbdr/enetc_teardown_cbdr (existing)
- ENETC v4 VF will register enetc4_setup_cbdr/enetc4_teardown_cbdr

Update the enetc-vf driver to call CBDR operations through si->ops
instead of directly invoking the v1 functions. This enables runtime
selection of the correct CBDR backend based on hardware version.

Changes:
- Add setup_cbdr() and teardown_cbdr() hooks to struct enetc_si_ops
- Register v1 CBDR functions in enetc_vsi_ops
- Replace direct calls with si->ops->setup_cbdr() and
  si->ops->teardown_cbdr() in enetc_vf.c

No functional changes to existing v1 VF behavior.

Signed-off-by: Wei Fang <wei.fang@xxxxxxx>
---
 drivers/net/ethernet/freescale/enetc/enetc.h    | 2 ++
 drivers/net/ethernet/freescale/enetc/enetc_vf.c | 8 +++++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h
index 772f0ab2f8c1..04a5dd5ea6c7 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc.h
@@ -297,6 +297,8 @@ struct enetc_si;
 struct enetc_si_ops {
 	int (*get_rss_table)(struct enetc_si *si, u32 *table, int count);
 	int (*set_rss_table)(struct enetc_si *si, const u32 *table, int count);
+	int (*setup_cbdr)(struct enetc_si *si);
+	void (*teardown_cbdr)(struct enetc_si *si);
 };
 
 /* PCI IEP device data */
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_vf.c b/drivers/net/ethernet/freescale/enetc/enetc_vf.c
index e8ad5ad5aba4..9cdb0a4d6baf 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_vf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_vf.c
@@ -288,6 +288,8 @@ static void enetc_vf_netdev_setup(struct enetc_si *si, struct net_device *ndev,
 static const struct enetc_si_ops enetc_vsi_ops = {
 	.get_rss_table = enetc_get_rss_table,
 	.set_rss_table = enetc_set_rss_table,
+	.setup_cbdr = enetc_setup_cbdr,
+	.teardown_cbdr = enetc_teardown_cbdr,
 };
 
 static int enetc_vf_probe(struct pci_dev *pdev,
@@ -328,7 +330,7 @@ static int enetc_vf_probe(struct pci_dev *pdev,
 
 	enetc_init_si_rings_params(priv);
 
-	err = enetc_setup_cbdr(si);
+	err = si->ops->setup_cbdr(si);
 	if (err)
 		goto err_setup_cbdr;
 
@@ -364,7 +366,7 @@ static int enetc_vf_probe(struct pci_dev *pdev,
 err_alloc_msix:
 	enetc_free_si_resources(priv);
 err_alloc_si_res:
-	enetc_teardown_cbdr(si);
+	si->ops->teardown_cbdr(si);
 err_setup_cbdr:
 	si->ndev = NULL;
 	free_netdev(ndev);
@@ -389,7 +391,7 @@ static void enetc_vf_remove(struct pci_dev *pdev)
 	enetc_free_msix(priv);
 
 	enetc_free_si_resources(priv);
-	enetc_teardown_cbdr(si);
+	si->ops->teardown_cbdr(si);
 
 	free_netdev(si->ndev);
 
-- 
2.34.1