linux-kernel - [RFC PATCH v4 14/38] PCI: endpoint: pci-epf-vntb: Implement .get_private

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Message-ID: <20260118135440.1958279-15-den@valinux.co.jp>
Date: Sun, 18 Jan 2026 22:54:16 +0900
From: Koichiro Den <den@...inux.co.jp>
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Subject: [RFC PATCH v4 14/38] PCI: endpoint: pci-epf-vntb: Implement .get_private_data() callback

Implement the new get_private_data() operation for the EPF vNTB driver
to expose its associated EPC device to NTB subsystems.

Signed-off-by: Koichiro Den <den@...inux.co.jp>
---
 drivers/pci/endpoint/functions/pci-epf-vntb.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
index 98128c2c5079..9fbc27000f77 100644
--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
@@ -1747,6 +1747,15 @@ static int vntb_epf_link_disable(struct ntb_dev *ntb)
 	return 0;
 }
 
+static void *vntb_epf_get_private_data(struct ntb_dev *ndev)
+{
+	struct epf_ntb *ntb = ntb_ndev(ndev);
+
+	if (!ntb || !ntb->epf)
+		return NULL;
+	return ntb->epf->epc;
+}
+
 static const struct ntb_dev_ops vntb_epf_ops = {
 	.mw_count		= vntb_epf_mw_count,
 	.spad_count		= vntb_epf_spad_count,
@@ -1771,6 +1780,7 @@ static const struct ntb_dev_ops vntb_epf_ops = {
 	.db_clear_mask		= vntb_epf_db_clear_mask,
 	.db_clear		= vntb_epf_db_clear,
 	.link_disable		= vntb_epf_link_disable,
+	.get_private_data	= vntb_epf_get_private_data,
 };
 
 static int pci_vntb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
-- 
2.51.0