PCI: dwc: designware: Provide page_size to pci_epc_mem

Use the newly introduced __pci_epc_mem_init() instead of pci_epc_mem_init()
to provide page_size to pci_epc_mem. This is in preparation for
adding EP support to K2G which has a restriction that the
address region should be either divided into 1MB/2MB/4MB or 8MB
sizes (Ref: 11.14.4.9.1 Outbound Address Translation in K2G TRM SPRUHY8F
January 2016 – Revised May 2017).
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/dwc/pcie-designware-ep.c

@@ -328,7 +328,8 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 	if (ret < 0)
 		epc->max_functions = 1;
 
-	ret = pci_epc_mem_init(epc, ep->phys_base, ep->addr_size);
+	ret = __pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
+				 ep->page_size);
 	if (ret < 0) {
 		dev_err(dev, "Failed to initialize address space\n");
 		return ret;

drivers/pci/dwc/pcie-designware.h

@@ -186,6 +186,7 @@ struct dw_pcie_ep {
 	struct dw_pcie_ep_ops	*ops;
 	phys_addr_t		phys_base;
 	size_t			addr_size;
+	size_t			page_size;
 	u8			bar_to_atu[6];
 	phys_addr_t		*outbound_addr;
 	unsigned long		ib_window_map;