linux-kernel - [RFC PATCH v3 05/35] PCI: endpoint: pci-epf-vntb: Propagate MW offset from configfs when present

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Message-ID: <20251217151609.3162665-6-den@valinux.co.jp>
Date: Thu, 18 Dec 2025 00:15:39 +0900
From: Koichiro Den <den@...inux.co.jp>
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Subject: [RFC PATCH v3 05/35] PCI: endpoint: pci-epf-vntb: Propagate MW offset from configfs when present

The NTB API functions ntb_mw_set_trans() and ntb_mw_get_align() now
support non-zero MW offsets. Update pci-epf-vntb to populate
mws_offset[idx] when the offset parameter is provided. Users can now
retrieve the offset and pass it to ntb_mw_set_trans().

Signed-off-by: Koichiro Den <den@...inux.co.jp>
---
 drivers/pci/endpoint/functions/pci-epf-vntb.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
index 4db1fabfd8a4..337995e2f3ce 100644
--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
@@ -1521,6 +1521,9 @@ static int vntb_epf_mw_get_align(struct ntb_dev *ndev, int pidx, int idx,
 	if (size_max)
 		*size_max = ntb->mws_size[idx];
 
+	if (offset)
+		*offset = ntb->mws_offset[idx];
+
 	return 0;
 }
 
-- 
2.51.0