linux-kernel - [RFC PATCH 19/25] NTB: epf: vntb: Implement .get_pci

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Message-ID: <20251023071916.901355-20-den@valinux.co.jp>
Date: Thu, 23 Oct 2025 16:19:10 +0900
From: Koichiro Den <den@...inux.co.jp>
To: ntb@...ts.linux.dev,
	linux-pci@...r.kernel.org,
	dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org
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Subject: [RFC PATCH 19/25] NTB: epf: vntb: Implement .get_pci_epc() callback

Implement the new get_pci_epc() 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 6495f99ffd4f..e3acea19f473 100644
--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
@@ -1446,6 +1446,15 @@ static int vntb_epf_link_disable(struct ntb_dev *ntb)
 	return 0;
 }
 
+static struct pci_epc *vntb_epf_get_pci_epc(struct ntb_dev *ntb)
+{
+	struct epf_ntb *ndev = ntb_ndev(ntb);
+
+	if (!ndev || !ndev->epf)
+		return NULL;
+	return ndev->epf->epc;
+}
+
 static const struct ntb_dev_ops vntb_epf_ops = {
 	.mw_count		= vntb_epf_mw_count,
 	.spad_count		= vntb_epf_spad_count,
@@ -1467,6 +1476,7 @@ 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_pci_epc		= vntb_epf_get_pci_epc,
 };
 
 static int pci_vntb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
-- 
2.48.1