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Currently, EPF 'of_node' is NULL, but many functions depend on 'of_node' settings, such as DMA, IOMMU, and MSI. At present, all DMA allocation functions use the EPC's device node, but they should use the EPF one. For multiple function drivers, IOMMU/MSI should be different for each function driver. If multiple function devices share the same EPC device, there will be no isolation between them. Setting the ID and 'of_node' prepares for proper support. Signed-off-by: Frank Li --- change from v14 to v15 - none change from v13 to v14 new patch --- drivers/pci/endpoint/pci-epf-core.c | 4 ++++ include/linux/pci-epf.h | 2 ++ 2 files changed, 6 insertions(+) diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c index 50bc2892a36c5..f728ee2660a4e 100644 --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -120,12 +120,16 @@ int pci_epf_bind(struct pci_epf *epf) epf_vf->sec_epc_func_no = epf->sec_epc_func_no; epf_vf->epc = epf->epc; epf_vf->sec_epc = epf->sec_epc; + epf_vf->dev.id = PCI_EPF_DEVID(epf->func_no, vfunc_no); + device_set_of_node_from_dev(&epf_vf->dev, epc->dev.parent); ret = epf_vf->driver->ops->bind(epf_vf); if (ret) goto ret; epf_vf->is_bound = true; } + epf->dev.id = PCI_EPF_DEVID(epf->func_no, 0); + device_set_of_node_from_dev(&epf->dev, epc->dev.parent); ret = epf->driver->ops->bind(epf); if (ret) goto ret; diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index ee6156bcbbd05..d2790b8b29394 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -212,6 +212,8 @@ static inline void *epf_get_drvdata(struct pci_epf *epf) return dev_get_drvdata(&epf->dev); } +#define PCI_EPF_DEVID(func_no, vfunc_no) ((vfunc_no) << 3 | (func_no)) + struct pci_epf *pci_epf_create(const char *name); void pci_epf_destroy(struct pci_epf *epf); int __pci_epf_register_driver(struct pci_epf_driver *driver, -- 2.34.1