diff options
| author | Koichiro Den <den@valinux.co.jp> | 2026-03-06 06:14:43 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2026-03-27 18:56:41 +0300 |
| commit | 70becc1a9b453ce04f97507585afc2cf47e67b11 (patch) | |
| tree | c0bd6e2d47e9b72723a1188c0795885656c0d7f3 | |
| parent | 852b94ff92cbe26a0dbb15eed9474f5493767f3b (diff) | |
| download | linux-70becc1a9b453ce04f97507585afc2cf47e67b11.tar.xz | |
PCI: endpoint: pci-epf-vntb: Implement .get_dma_dev()
When vNTB is used as a PCI endpoint function, the NTB device is backed
by a virtual PCI function. For DMA API allocations and mappings, NTB
clients must use the device that is associated with the IOMMU domain.
Implement ntb_dev_ops->get_dma_dev() for pci-epf-vntb and return the EPC
parent device.
Suggested-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20260306031443.1911860-4-den@valinux.co.jp
| -rw-r--r-- | drivers/pci/endpoint/functions/pci-epf-vntb.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c index 805353528967..2256c3062b1a 100644 --- a/drivers/pci/endpoint/functions/pci-epf-vntb.c +++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c @@ -1428,6 +1428,14 @@ static int vntb_epf_link_disable(struct ntb_dev *ntb) return 0; } +static struct device *vntb_epf_get_dma_dev(struct ntb_dev *ndev) +{ + struct epf_ntb *ntb = ntb_ndev(ndev); + struct pci_epc *epc = ntb->epf->epc; + + return epc->dev.parent; +} + static const struct ntb_dev_ops vntb_epf_ops = { .mw_count = vntb_epf_mw_count, .spad_count = vntb_epf_spad_count, @@ -1449,6 +1457,7 @@ 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_dma_dev = vntb_epf_get_dma_dev, }; static int pci_vntb_probe(struct pci_dev *pdev, const struct pci_device_id *id) |