PCI: microchip: Move PLDA functions to pcie-plda-host.c

Move plda_pcie_setup_window() and plda_pcie_setup_iomems() to
pcie-plda-host.c so they can be shared by all PLDA-based drivers.

Link: https://lore.kernel.org/linux-pci/20240328091835.14797-10-minda.chen@starfivetech.com
Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>

Author: mindachen1987

MAINTAINERS

@@ -17224,6 +17224,7 @@ M:	Daire McNamara <daire.mcnamara@microchip.com>
 L:	linux-pci@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/pci/plda,xpressrich3-axi-common.yaml
+F:	drivers/pci/controller/plda/pcie-plda-host.c
 F:	drivers/pci/controller/plda/pcie-plda.h
 
 PCI DRIVER FOR RENESAS R-CAR

drivers/pci/controller/plda/Kconfig

@@ -3,10 +3,14 @@
 menu "PLDA-based PCIe controllers"
 	depends on PCI
 
+config PCIE_PLDA_HOST
+	bool
+
 config PCIE_MICROCHIP_HOST
 	tristate "Microchip AXI PCIe controller"
 	depends on PCI_MSI && OF
 	select PCI_HOST_COMMON
+	select PCIE_PLDA_HOST
 	help
 	  Say Y here if you want kernel to support the Microchip AXI PCIe
 	  Host Bridge driver.

drivers/pci/controller/plda/Makefile

@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PCIE_PLDA_HOST) += pcie-plda-host.o
 obj-$(CONFIG_PCIE_MICROCHIP_HOST) += pcie-microchip-host.o

drivers/pci/controller/plda/pcie-microchip-host.c

@@ -838,66 +838,6 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
 	return mc_allocate_msi_domains(port);
 }
 
-static void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
-				   phys_addr_t axi_addr, phys_addr_t pci_addr,
-				   size_t size)
-{
-	u32 atr_sz = ilog2(size) - 1;
-	u32 val;
-
-	if (index == 0)
-		val = PCIE_CONFIG_INTERFACE;
-	else
-		val = PCIE_TX_RX_INTERFACE;
-
-	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
-	       ATR0_AXI4_SLV0_TRSL_PARAM);
-
-	val = lower_32_bits(axi_addr) | (atr_sz << ATR_SIZE_SHIFT) |
-			    ATR_IMPL_ENABLE;
-	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
-	       ATR0_AXI4_SLV0_SRCADDR_PARAM);
-
-	val = upper_32_bits(axi_addr);
-	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
-	       ATR0_AXI4_SLV0_SRC_ADDR);
-
-	val = lower_32_bits(pci_addr);
-	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
-	       ATR0_AXI4_SLV0_TRSL_ADDR_LSB);
-
-	val = upper_32_bits(pci_addr);
-	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
-	       ATR0_AXI4_SLV0_TRSL_ADDR_UDW);
-
-	val = readl(bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
-	val |= (ATR0_PCIE_ATR_SIZE << ATR0_PCIE_ATR_SIZE_SHIFT);
-	writel(val, bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
-	writel(0, bridge_base_addr + ATR0_PCIE_WIN0_SRC_ADDR);
-}
-
-static int plda_pcie_setup_iomems(struct platform_device *pdev,
-				  struct plda_pcie_rp *port)
-{
-	void __iomem *bridge_base_addr = port->bridge_addr;
-	struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
-	struct resource_entry *entry;
-	u64 pci_addr;
-	u32 index = 1;
-
-	resource_list_for_each_entry(entry, &bridge->windows) {
-		if (resource_type(entry->res) == IORESOURCE_MEM) {
-			pci_addr = entry->res->start - entry->offset;
-			plda_pcie_setup_window(bridge_base_addr, index,
-					       entry->res->start, pci_addr,
-					       resource_size(entry->res));
-			index++;
-		}
-	}
-
-	return 0;
-}
-
 static inline void mc_clear_secs(struct mc_pcie *port)
 {
 	void __iomem *ctrl_base_addr = port->axi_base_addr + MC_PCIE_CTRL_ADDR;

drivers/pci/controller/plda/pcie-plda-host.c

@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PLDA PCIe XpressRich host controller driver
+ *
+ * Copyright (C) 2023 Microchip Co. Ltd
+ *
+ * Author: Daire McNamara <daire.mcnamara@microchip.com>
+ */
+
+#include <linux/pci-ecam.h>
+
+#include "pcie-plda.h"
+
+void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
+			    phys_addr_t axi_addr, phys_addr_t pci_addr,
+			    size_t size)
+{
+	u32 atr_sz = ilog2(size) - 1;
+	u32 val;
+
+	if (index == 0)
+		val = PCIE_CONFIG_INTERFACE;
+	else
+		val = PCIE_TX_RX_INTERFACE;
+
+	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+	       ATR0_AXI4_SLV0_TRSL_PARAM);
+
+	val = lower_32_bits(axi_addr) | (atr_sz << ATR_SIZE_SHIFT) |
+			    ATR_IMPL_ENABLE;
+	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+	       ATR0_AXI4_SLV0_SRCADDR_PARAM);
+
+	val = upper_32_bits(axi_addr);
+	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+	       ATR0_AXI4_SLV0_SRC_ADDR);
+
+	val = lower_32_bits(pci_addr);
+	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+	       ATR0_AXI4_SLV0_TRSL_ADDR_LSB);
+
+	val = upper_32_bits(pci_addr);
+	writel(val, bridge_base_addr + (index * ATR_ENTRY_SIZE) +
+	       ATR0_AXI4_SLV0_TRSL_ADDR_UDW);
+
+	val = readl(bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
+	val |= (ATR0_PCIE_ATR_SIZE << ATR0_PCIE_ATR_SIZE_SHIFT);
+	writel(val, bridge_base_addr + ATR0_PCIE_WIN0_SRCADDR_PARAM);
+	writel(0, bridge_base_addr + ATR0_PCIE_WIN0_SRC_ADDR);
+}
+EXPORT_SYMBOL_GPL(plda_pcie_setup_window);
+
+int plda_pcie_setup_iomems(struct platform_device *pdev,
+			   struct plda_pcie_rp *port)
+{
+	void __iomem *bridge_base_addr = port->bridge_addr;
+	struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
+	struct resource_entry *entry;
+	u64 pci_addr;
+	u32 index = 1;
+
+	resource_list_for_each_entry(entry, &bridge->windows) {
+		if (resource_type(entry->res) == IORESOURCE_MEM) {
+			pci_addr = entry->res->start - entry->offset;
+			plda_pcie_setup_window(bridge_base_addr, index,
+					       entry->res->start, pci_addr,
+					       resource_size(entry->res));
+			index++;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(plda_pcie_setup_iomems);

drivers/pci/controller/plda/pcie-plda.h

@@ -126,4 +126,9 @@ struct plda_pcie_rp {
 	void __iomem *bridge_addr;
 };
 
+void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
+			    phys_addr_t axi_addr, phys_addr_t pci_addr,
+			    size_t size);
+int plda_pcie_setup_iomems(struct platform_device *pdev,
+			   struct plda_pcie_rp *port);
 #endif