powernv/pci: Fold pnv_pci_dma_dev_setup() into the pci-ioda.c version

pnv_pci_dma_dev_setup() does nothing but call the phb->dma_dev_setup()
callback, if one exists. That callback is only set for normal PCIe PHBs so
we can remove the layer of indirection and use the ioda version in
the pci_controller_ops.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200110070207.439-5-oohall@gmail.com

arch/powerpc/platforms/powernv/pci-ioda.c

@@ -1760,8 +1760,10 @@ int pnv_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
 }
 #endif /* CONFIG_PCI_IOV */
 
-static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev)
+static void pnv_pci_ioda_dma_dev_setup(struct pci_dev *pdev)
 {
+	struct pci_controller *hose = pci_bus_to_host(pdev->bus);
+	struct pnv_phb *phb = hose->private_data;
 	struct pci_dn *pdn = pci_get_pdn(pdev);
 	struct pnv_ioda_pe *pe;
 
@@ -3690,7 +3692,7 @@ static void pnv_pci_ioda_shutdown(struct pci_controller *hose)
 }
 
 static const struct pci_controller_ops pnv_pci_ioda_controller_ops = {
-	.dma_dev_setup		= pnv_pci_dma_dev_setup,
+	.dma_dev_setup		= pnv_pci_ioda_dma_dev_setup,
 	.dma_bus_setup		= pnv_pci_dma_bus_setup,
 	.iommu_bypass_supported	= pnv_pci_ioda_iommu_bypass_supported,
 	.setup_msi_irqs		= pnv_setup_msi_irqs,
@@ -3950,7 +3952,6 @@ static void __init pnv_pci_init_ioda_phb(struct device_node *np,
 		hose->controller_ops = pnv_npu_ocapi_ioda_controller_ops;
 		break;
 	default:
-		phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup;
 		hose->controller_ops = pnv_pci_ioda_controller_ops;
 	}
 

arch/powerpc/platforms/powernv/pci.c

@@ -814,15 +814,6 @@ struct iommu_table *pnv_pci_table_alloc(int nid)
 	return tbl;
 }
 
-void pnv_pci_dma_dev_setup(struct pci_dev *pdev)
-{
-	struct pci_controller *hose = pci_bus_to_host(pdev->bus);
-	struct pnv_phb *phb = hose->private_data;
-
-	if (phb && phb->dma_dev_setup)
-		phb->dma_dev_setup(phb, pdev);
-}
-
 void pnv_pci_dma_bus_setup(struct pci_bus *bus)
 {
 	struct pci_controller *hose = bus->sysdata;

arch/powerpc/platforms/powernv/pci.h

@@ -108,7 +108,6 @@ struct pnv_phb {
 	int (*msi_setup)(struct pnv_phb *phb, struct pci_dev *dev,
 			 unsigned int hwirq, unsigned int virq,
 			 unsigned int is_64, struct msi_msg *msg);
-	void (*dma_dev_setup)(struct pnv_phb *phb, struct pci_dev *pdev);
 	int (*init_m64)(struct pnv_phb *phb);
 	int (*get_pe_state)(struct pnv_phb *phb, int pe_no);
 	void (*freeze_pe)(struct pnv_phb *phb, int pe_no);
@@ -189,7 +188,6 @@ extern void pnv_npu2_map_lpar(struct pnv_ioda_pe *gpe, unsigned long msr);
 extern void pnv_pci_reset_secondary_bus(struct pci_dev *dev);
 extern int pnv_eeh_phb_reset(struct pci_controller *hose, int option);
 
-extern void pnv_pci_dma_dev_setup(struct pci_dev *pdev);
 extern void pnv_pci_dma_bus_setup(struct pci_bus *bus);
 extern int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);
 extern void pnv_teardown_msi_irqs(struct pci_dev *pdev);