[PATCH v3 05/11] PCI: plda: Move the common functions to pcie-plda-host.c

[Minda Chen]

Move MSI IRQ, INTx IRQ and setup functions to common
pcie-plda-host.c.

Signed-off-by: Minda Chen <minda.chen@xxxxxxxxxxxxxxxx>
---
 drivers/pci/controller/plda/Kconfig           |   4 +
 drivers/pci/controller/plda/Makefile          |   1 +
 .../pci/controller/plda/pcie-microchip-host.c | 289 ----------------
 drivers/pci/controller/plda/pcie-plda-host.c  | 312 ++++++++++++++++++
 drivers/pci/controller/plda/pcie-plda.h       |  11 +
 5 files changed, 328 insertions(+), 289 deletions(-)
 create mode 100644 drivers/pci/controller/plda/pcie-plda-host.c

diff --git a/drivers/pci/controller/plda/Kconfig b/drivers/pci/controller/plda/Kconfig
index 5cb3be4fc98c..e54a82ee94f5 100644
--- a/drivers/pci/controller/plda/Kconfig
+++ b/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.
diff --git a/drivers/pci/controller/plda/Makefile b/drivers/pci/controller/plda/Makefile
index e1a265cbf91c..4340ab007f44 100644
--- a/drivers/pci/controller/plda/Makefile
+++ b/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
diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index e25459f34891..c28840315019 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -313,236 +313,6 @@ static void mc_pcie_enable_msi(struct mc_pcie *port, void __iomem *ecam)
 		       ecam + MC_MSI_CAP_CTRL_OFFSET + PCI_MSI_ADDRESS_HI);
 }
 
-static void plda_handle_msi(struct irq_desc *desc)
-{
-	struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
-	struct irq_chip *chip = irq_desc_get_chip(desc);
-	struct device *dev = port->dev;
-	struct plda_msi *msi = &port->msi;
-	void __iomem *bridge_base_addr = port->bridge_addr;
-	unsigned long status;
-	u32 bit;
-	int ret;
-
-	chained_irq_enter(chip, desc);
-
-	status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
-	if (status & PM_MSI_INT_MSI_MASK) {
-		writel_relaxed(status & PM_MSI_INT_MSI_MASK, bridge_base_addr + ISTATUS_LOCAL);
-		status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
-		for_each_set_bit(bit, &status, msi->num_vectors) {
-			ret = generic_handle_domain_irq(msi->dev_domain, bit);
-			if (ret)
-				dev_err_ratelimited(dev, "bad MSI IRQ %d\n",
-						    bit);
-		}
-	}
-
-	chained_irq_exit(chip, desc);
-}
-
-static void plda_msi_bottom_irq_ack(struct irq_data *data)
-{
-	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
-	void __iomem *bridge_base_addr = port->bridge_addr;
-	u32 bitpos = data->hwirq;
-
-	writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
-}
-
-static void plda_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
-{
-	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
-	phys_addr_t addr = port->msi.vector_phy;
-
-	msg->address_lo = lower_32_bits(addr);
-	msg->address_hi = upper_32_bits(addr);
-	msg->data = data->hwirq;
-
-	dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n",
-		(int)data->hwirq, msg->address_hi, msg->address_lo);
-}
-
-static int plda_msi_set_affinity(struct irq_data *irq_data,
-				 const struct cpumask *mask, bool force)
-{
-	return -EINVAL;
-}
-
-static struct irq_chip plda_msi_bottom_irq_chip = {
-	.name = "PLDA MSI",
-	.irq_ack = plda_msi_bottom_irq_ack,
-	.irq_compose_msi_msg = plda_compose_msi_msg,
-	.irq_set_affinity = plda_msi_set_affinity,
-};
-
-static int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
-				     unsigned int nr_irqs, void *args)
-{
-	struct plda_pcie_rp *port = domain->host_data;
-	struct plda_msi *msi = &port->msi;
-	unsigned long bit;
-
-	mutex_lock(&msi->lock);
-	bit = find_first_zero_bit(msi->used, msi->num_vectors);
-	if (bit >= msi->num_vectors) {
-		mutex_unlock(&msi->lock);
-		return -ENOSPC;
-	}
-
-	set_bit(bit, msi->used);
-
-	irq_domain_set_info(domain, virq, bit, &plda_msi_bottom_irq_chip,
-			    domain->host_data, handle_edge_irq, NULL, NULL);
-
-	mutex_unlock(&msi->lock);
-
-	return 0;
-}
-
-static void plda_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
-				     unsigned int nr_irqs)
-{
-	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
-	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(d);
-	struct plda_msi *msi = &port->msi;
-
-	mutex_lock(&msi->lock);
-
-	if (test_bit(d->hwirq, msi->used))
-		__clear_bit(d->hwirq, msi->used);
-	else
-		dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq);
-
-	mutex_unlock(&msi->lock);
-}
-
-static const struct irq_domain_ops msi_domain_ops = {
-	.alloc	= plda_irq_msi_domain_alloc,
-	.free	= plda_irq_msi_domain_free,
-};
-
-static struct irq_chip plda_msi_irq_chip = {
-	.name = "PLDA PCIe MSI",
-	.irq_ack = irq_chip_ack_parent,
-	.irq_mask = pci_msi_mask_irq,
-	.irq_unmask = pci_msi_unmask_irq,
-};
-
-static struct msi_domain_info plda_msi_domain_info = {
-	.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-		  MSI_FLAG_PCI_MSIX),
-	.chip = &plda_msi_irq_chip,
-};
-
-static int plda_allocate_msi_domains(struct plda_pcie_rp *port)
-{
-	struct device *dev = port->dev;
-	struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
-	struct plda_msi *msi = &port->msi;
-
-	mutex_init(&port->msi.lock);
-
-	msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors,
-						&msi_domain_ops, port);
-	if (!msi->dev_domain) {
-		dev_err(dev, "failed to create IRQ domain\n");
-		return -ENOMEM;
-	}
-
-	msi->msi_domain = pci_msi_create_irq_domain(fwnode, &plda_msi_domain_info,
-						    msi->dev_domain);
-	if (!msi->msi_domain) {
-		dev_err(dev, "failed to create MSI domain\n");
-		irq_domain_remove(msi->dev_domain);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-static void plda_handle_intx(struct irq_desc *desc)
-{
-	struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
-	struct irq_chip *chip = irq_desc_get_chip(desc);
-	struct device *dev = port->dev;
-	void __iomem *bridge_base_addr = port->bridge_addr;
-	unsigned long status;
-	u32 bit;
-	int ret;
-
-	chained_irq_enter(chip, desc);
-
-	status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
-	if (status & PM_MSI_INT_INTX_MASK) {
-		status &= PM_MSI_INT_INTX_MASK;
-		status >>= PM_MSI_INT_INTX_SHIFT;
-		for_each_set_bit(bit, &status, PCI_NUM_INTX) {
-			ret = generic_handle_domain_irq(port->intx_domain, bit);
-			if (ret)
-				dev_err_ratelimited(dev, "bad INTx IRQ %d\n",
-						    bit);
-		}
-	}
-
-	chained_irq_exit(chip, desc);
-}
-
-static void plda_ack_intx_irq(struct irq_data *data)
-{
-	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
-	void __iomem *bridge_base_addr = port->bridge_addr;
-	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
-
-	writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
-}
-
-static void plda_mask_intx_irq(struct irq_data *data)
-{
-	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
-	void __iomem *bridge_base_addr = port->bridge_addr;
-	unsigned long flags;
-	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
-	u32 val;
-
-	raw_spin_lock_irqsave(&port->lock, flags);
-	val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
-	val &= ~mask;
-	writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
-	raw_spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static void plda_unmask_intx_irq(struct irq_data *data)
-{
-	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
-	void __iomem *bridge_base_addr = port->bridge_addr;
-	unsigned long flags;
-	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
-	u32 val;
-
-	raw_spin_lock_irqsave(&port->lock, flags);
-	val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
-	val |= mask;
-	writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
-	raw_spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static struct irq_chip plda_intx_irq_chip = {
-	.name = "PLDA PCIe INTx",
-	.irq_ack = plda_ack_intx_irq,
-	.irq_mask = plda_mask_intx_irq,
-	.irq_unmask = plda_unmask_intx_irq,
-};
-
-static int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
-			      irq_hw_number_t hwirq)
-{
-	irq_set_chip_and_handler(irq, &plda_intx_irq_chip, handle_level_irq);
-	irq_set_chip_data(irq, domain->host_data);
-
-	return 0;
-}
-
 static const struct irq_domain_ops intx_domain_ops = {
 	.map = plda_pcie_intx_map,
 };
@@ -827,65 +597,6 @@ static int mc_pcie_init_irq_domains(struct plda_pcie_rp *port)
 	return plda_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 pci_host_bridge *bridge,
-				  struct plda_pcie_rp *port)
-{
-	void __iomem *bridge_base_addr = port->bridge_addr;
-	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;
diff --git a/drivers/pci/controller/plda/pcie-plda-host.c b/drivers/pci/controller/plda/pcie-plda-host.c
new file mode 100644
index 000000000000..ce02cfe6b5fa
--- /dev/null
+++ b/drivers/pci/controller/plda/pcie-plda-host.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PLDA PCIe XpressRich host controller driver
+ *
+ * Copyright (C) 2023 Microchip Co. Ltd
+ *		      StarFive Co. Ltd.
+ *
+ * Author: Daire McNamara <daire.mcnamara@xxxxxxxxxxxxx>
+ * Author: Minda Chen <minda.chen@xxxxxxxxxxxxxxxx>
+ */
+
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/msi.h>
+#include <linux/of_address.h>
+#include <linux/of_pci.h>
+#include <linux/pci_regs.h>
+#include <linux/pci-ecam.h>
+#include <linux/platform_device.h>
+
+#include "pcie-plda.h"
+
+void plda_handle_msi(struct irq_desc *desc)
+{
+	struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	struct device *dev = port->dev;
+	struct plda_msi *msi = &port->msi;
+	void __iomem *bridge_base_addr = port->bridge_addr;
+	unsigned long status;
+	u32 bit;
+	int ret;
+
+	chained_irq_enter(chip, desc);
+
+	status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
+	if (status & PM_MSI_INT_MSI_MASK) {
+		writel_relaxed(status & PM_MSI_INT_MSI_MASK, bridge_base_addr + ISTATUS_LOCAL);
+		status = readl_relaxed(bridge_base_addr + ISTATUS_MSI);
+		for_each_set_bit(bit, &status, msi->num_vectors) {
+			ret = generic_handle_domain_irq(msi->dev_domain, bit);
+			if (ret)
+				dev_err_ratelimited(dev, "bad MSI IRQ %d\n",
+						    bit);
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static void plda_msi_bottom_irq_ack(struct irq_data *data)
+{
+	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+	void __iomem *bridge_base_addr = port->bridge_addr;
+	u32 bitpos = data->hwirq;
+
+	writel_relaxed(BIT(bitpos), bridge_base_addr + ISTATUS_MSI);
+}
+
+static void plda_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+	phys_addr_t addr = port->msi.vector_phy;
+
+	msg->address_lo = lower_32_bits(addr);
+	msg->address_hi = upper_32_bits(addr);
+	msg->data = data->hwirq;
+
+	dev_dbg(port->dev, "msi#%x address_hi %#x address_lo %#x\n",
+		(int)data->hwirq, msg->address_hi, msg->address_lo);
+}
+
+static int plda_msi_set_affinity(struct irq_data *irq_data,
+				 const struct cpumask *mask, bool force)
+{
+	return -EINVAL;
+}
+
+static struct irq_chip plda_msi_bottom_irq_chip = {
+	.name = "PLDA MSI",
+	.irq_ack = plda_msi_bottom_irq_ack,
+	.irq_compose_msi_msg = plda_compose_msi_msg,
+	.irq_set_affinity = plda_msi_set_affinity,
+};
+
+int plda_irq_msi_domain_alloc(struct irq_domain *domain, unsigned int virq,
+				     unsigned int nr_irqs, void *args)
+{
+	struct plda_pcie_rp *port = domain->host_data;
+	struct plda_msi *msi = &port->msi;
+	unsigned long bit;
+
+	mutex_lock(&msi->lock);
+	bit = find_first_zero_bit(msi->used, msi->num_vectors);
+	if (bit >= msi->num_vectors) {
+		mutex_unlock(&msi->lock);
+		return -ENOSPC;
+	}
+
+	set_bit(bit, msi->used);
+
+	irq_domain_set_info(domain, virq, bit, &plda_msi_bottom_irq_chip,
+			    domain->host_data, handle_edge_irq, NULL, NULL);
+
+	mutex_unlock(&msi->lock);
+
+	return 0;
+}
+
+static void plda_irq_msi_domain_free(struct irq_domain *domain, unsigned int virq,
+				     unsigned int nr_irqs)
+{
+	struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(d);
+	struct plda_msi *msi = &port->msi;
+
+	mutex_lock(&msi->lock);
+
+	if (test_bit(d->hwirq, msi->used))
+		__clear_bit(d->hwirq, msi->used);
+	else
+		dev_err(port->dev, "trying to free unused MSI%lu\n", d->hwirq);
+
+	mutex_unlock(&msi->lock);
+}
+
+static const struct irq_domain_ops msi_domain_ops = {
+	.alloc	= plda_irq_msi_domain_alloc,
+	.free	= plda_irq_msi_domain_free,
+};
+
+static struct irq_chip plda_msi_irq_chip = {
+	.name = "PLDA PCIe MSI",
+	.irq_ack = irq_chip_ack_parent,
+	.irq_mask = pci_msi_mask_irq,
+	.irq_unmask = pci_msi_unmask_irq,
+};
+
+static struct msi_domain_info plda_msi_domain_info = {
+	.flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+		  MSI_FLAG_PCI_MSIX),
+	.chip = &plda_msi_irq_chip,
+};
+
+int plda_allocate_msi_domains(struct plda_pcie_rp *port)
+{
+	struct device *dev = port->dev;
+	struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
+	struct plda_msi *msi = &port->msi;
+
+	mutex_init(&port->msi.lock);
+
+	msi->dev_domain = irq_domain_add_linear(NULL, msi->num_vectors,
+						&msi_domain_ops, port);
+	if (!msi->dev_domain) {
+		dev_err(dev, "failed to create IRQ domain\n");
+		return -ENOMEM;
+	}
+
+	msi->msi_domain = pci_msi_create_irq_domain(fwnode, &plda_msi_domain_info,
+						    msi->dev_domain);
+	if (!msi->msi_domain) {
+		dev_err(dev, "failed to create MSI domain\n");
+		irq_domain_remove(msi->dev_domain);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+void plda_handle_intx(struct irq_desc *desc)
+{
+	struct plda_pcie_rp *port = irq_desc_get_handler_data(desc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	struct device *dev = port->dev;
+	void __iomem *bridge_base_addr = port->bridge_addr;
+	unsigned long status;
+	u32 bit;
+	int ret;
+
+	chained_irq_enter(chip, desc);
+
+	status = readl_relaxed(bridge_base_addr + ISTATUS_LOCAL);
+	if (status & PM_MSI_INT_INTX_MASK) {
+		status &= PM_MSI_INT_INTX_MASK;
+		status >>= PM_MSI_INT_INTX_SHIFT;
+		for_each_set_bit(bit, &status, PCI_NUM_INTX) {
+			ret = generic_handle_domain_irq(port->intx_domain, bit);
+			if (ret)
+				dev_err_ratelimited(dev, "bad INTx IRQ %d\n",
+						    bit);
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static void plda_ack_intx_irq(struct irq_data *data)
+{
+	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+	void __iomem *bridge_base_addr = port->bridge_addr;
+	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
+
+	writel_relaxed(mask, bridge_base_addr + ISTATUS_LOCAL);
+}
+
+static void plda_mask_intx_irq(struct irq_data *data)
+{
+	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+	void __iomem *bridge_base_addr = port->bridge_addr;
+	unsigned long flags;
+	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
+	u32 val;
+
+	raw_spin_lock_irqsave(&port->lock, flags);
+	val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
+	val &= ~mask;
+	writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
+	raw_spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static void plda_unmask_intx_irq(struct irq_data *data)
+{
+	struct plda_pcie_rp *port = irq_data_get_irq_chip_data(data);
+	void __iomem *bridge_base_addr = port->bridge_addr;
+	unsigned long flags;
+	u32 mask = BIT(data->hwirq + PM_MSI_INT_INTX_SHIFT);
+	u32 val;
+
+	raw_spin_lock_irqsave(&port->lock, flags);
+	val = readl_relaxed(bridge_base_addr + IMASK_LOCAL);
+	val |= mask;
+	writel_relaxed(val, bridge_base_addr + IMASK_LOCAL);
+	raw_spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static struct irq_chip plda_intx_irq_chip = {
+	.name = "PLDA PCIe INTx",
+	.irq_ack = plda_ack_intx_irq,
+	.irq_mask = plda_mask_intx_irq,
+	.irq_unmask = plda_unmask_intx_irq,
+};
+
+int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+			      irq_hw_number_t hwirq)
+{
+	irq_set_chip_and_handler(irq, &plda_intx_irq_chip, handle_level_irq);
+	irq_set_chip_data(irq, domain->host_data);
+
+	return 0;
+}
+
+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 pci_host_bridge *bridge,
+			   struct plda_pcie_rp *port)
+{
+	void __iomem *bridge_base_addr = port->bridge_addr;
+	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);
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 2a9f6ebc4560..b4daa74a8812 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -107,4 +107,15 @@ struct plda_pcie_rp {
 	struct plda_msi msi;
 	void __iomem *bridge_addr;
 };
+
+void plda_handle_msi(struct irq_desc *desc);
+int plda_allocate_msi_domains(struct plda_pcie_rp *port);
+void plda_handle_intx(struct irq_desc *desc);
+int plda_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+		       irq_hw_number_t hwirq);
+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 pci_host_bridge *bridge,
+			   struct plda_pcie_rp *port);
 #endif
-- 
2.17.1