[RFC PATCH v4 15/38] PCI: endpoint: pci-epf-vntb: Implement .get_dma_dev()
Koichiro Den <[email protected]>
| Newsgroups | dev.linux.lists.ntb,dev.linux.lists.iommu,org.kernel.vger.dmaengine,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-doc,org.kernel.vger.linux-kernel,org.kernel.vger.linux-kselftest,org.kernel.vger.linux-pci,org.kernel.vger.linux-renesas-soc,org.kernel.vger.netdev |
|---|---|
| Message-ID | <[email protected]> |
For DMA API allocations and mappings, pci-epf-vntb should provide an appropriate struct device for the NTB core/clients. Implement .get_dma_dev() and return the EPC parent device. Signed-off-by: Koichiro Den <[email protected]> --- 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 9fbc27000f77..7cd976757d15 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 struct device *vntb_epf_get_dma_dev(struct ntb_dev *ndev) +{ + struct epf_ntb *ntb = ntb_ndev(ndev); + + if (!ntb || !ntb->epf) + return NULL; + return ntb->epf->epc->dev.parent; +} + static void *vntb_epf_get_private_data(struct ntb_dev *ndev) { struct epf_ntb *ntb = ntb_ndev(ndev); @@ -1780,6 +1789,7 @@ 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, .get_private_data = vntb_epf_get_private_data, }; -- 2.51.0