1 // SPDX-License-Identifier: GPL-2.0+
5  * Copyright (c) 2012 - 2014 Xilinx, Inc.
7  * Based on the Tegra PCIe driver
24 #include <linux/pci-ecam.h>
94  * struct xilinx_pcie - PCIe port information
115 	return readl(pcie->reg_base + reg);  in pcie_read()
120 	writel(val, pcie->reg_base + reg);  in pcie_write()
130  * xilinx_pcie_clear_err_interrupts - Clear Error Interrupts
135 	struct device *dev = pcie->dev;  in xilinx_pcie_clear_err_interrupts()
147  * xilinx_pcie_valid_device - Check if a valid device is present on bus
155 	struct xilinx_pcie *pcie = bus->sysdata;  in xilinx_pcie_valid_device()
169  * xilinx_pcie_map_bus - Get configuration base
180 	struct xilinx_pcie *pcie = bus->sysdata;  in xilinx_pcie_map_bus()
185 	return pcie->reg_base + PCIE_ECAM_OFFSET(bus->number, devfn, where);  in xilinx_pcie_map_bus()
216 	msg->address_lo = lower_32_bits(pa);  in xilinx_compose_msi_msg()
217 	msg->address_hi = upper_32_bits(pa);  in xilinx_compose_msi_msg()
218 	msg->data = data->hwirq;  in xilinx_compose_msi_msg()
229 	struct xilinx_pcie *pcie = domain->host_data;  in xilinx_msi_domain_alloc()
232 	mutex_lock(&pcie->map_lock);  in xilinx_msi_domain_alloc()
234 	hwirq = bitmap_find_free_region(pcie->msi_map, XILINX_NUM_MSI_IRQS, order_base_2(nr_irqs));  in xilinx_msi_domain_alloc()
236 	mutex_unlock(&pcie->map_lock);  in xilinx_msi_domain_alloc()
239 		return -ENOSPC;  in xilinx_msi_domain_alloc()
243 				    &xilinx_msi_bottom_chip, domain->host_data,  in xilinx_msi_domain_alloc()
253 	struct xilinx_pcie *pcie = domain->host_data;  in xilinx_msi_domain_free()
255 	mutex_lock(&pcie->map_lock);  in xilinx_msi_domain_free()
257 	bitmap_release_region(pcie->msi_map, d->hwirq, order_base_2(nr_irqs));  in xilinx_msi_domain_free()
259 	mutex_unlock(&pcie->map_lock);  in xilinx_msi_domain_free()
275 	struct fwnode_handle *fwnode = dev_fwnode(pcie->dev);  in xilinx_allocate_msi_domains()
281 		dev_err(pcie->dev, "failed to create IRQ domain\n");  in xilinx_allocate_msi_domains()
282 		return -ENOMEM;  in xilinx_allocate_msi_domains()
286 	pcie->msi_domain = pci_msi_create_irq_domain(fwnode, &xilinx_msi_info, parent);  in xilinx_allocate_msi_domains()
287 	if (!pcie->msi_domain) {  in xilinx_allocate_msi_domains()
288 		dev_err(pcie->dev, "failed to create MSI domain\n");  in xilinx_allocate_msi_domains()
290 		return -ENOMEM;  in xilinx_allocate_msi_domains()
298 	struct irq_domain *parent = pcie->msi_domain->parent;  in xilinx_free_msi_domains()
300 	irq_domain_remove(pcie->msi_domain);  in xilinx_free_msi_domains()
307  * xilinx_pcie_intx_map - Set the handler for the INTx and mark IRQ as valid
318 	irq_set_chip_data(irq, domain->host_data);  in xilinx_pcie_intx_map()
332  * xilinx_pcie_intr_handler - Interrupt Service Handler
341 	struct device *dev = pcie->dev;  in xilinx_pcie_intr_handler()
365 		dev_warn(dev, "ECAM access timeout\n");  in xilinx_pcie_intr_handler()
397 			domain = pcie->msi_domain->parent;  in xilinx_pcie_intr_handler()
401 			domain = pcie->leg_domain;  in xilinx_pcie_intr_handler()
446  * xilinx_pcie_init_irq_domain - Initialize IRQ domain
453 	struct device *dev = pcie->dev;  in xilinx_pcie_init_irq_domain()
458 	pcie_intc_node = of_get_next_child(dev->of_node, NULL);  in xilinx_pcie_init_irq_domain()
461 		return -ENODEV;  in xilinx_pcie_init_irq_domain()
464 	pcie->leg_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX,  in xilinx_pcie_init_irq_domain()
468 	if (!pcie->leg_domain) {  in xilinx_pcie_init_irq_domain()
470 		return -ENODEV;  in xilinx_pcie_init_irq_domain()
489  * xilinx_pcie_init_port - Initialize hardware
494 	struct device *dev = pcie->dev;  in xilinx_pcie_init_port()
520  * xilinx_pcie_parse_dt - Parse Device tree
527 	struct device *dev = pcie->dev;  in xilinx_pcie_parse_dt()
528 	struct device_node *node = dev->of_node;  in xilinx_pcie_parse_dt()
539 	pcie->reg_base = devm_pci_remap_cfg_resource(dev, &regs);  in xilinx_pcie_parse_dt()
540 	if (IS_ERR(pcie->reg_base))  in xilinx_pcie_parse_dt()
541 		return PTR_ERR(pcie->reg_base);  in xilinx_pcie_parse_dt()
546 			       "xilinx-pcie", pcie);  in xilinx_pcie_parse_dt()
556  * xilinx_pcie_probe - Probe function
563 	struct device *dev = &pdev->dev;  in xilinx_pcie_probe()
568 	if (!dev->of_node)  in xilinx_pcie_probe()
569 		return -ENODEV;  in xilinx_pcie_probe()
573 		return -ENODEV;  in xilinx_pcie_probe()
576 	mutex_init(&pcie->map_lock);  in xilinx_pcie_probe()
577 	pcie->dev = dev;  in xilinx_pcie_probe()
593 	bridge->sysdata = pcie;  in xilinx_pcie_probe()
594 	bridge->ops = &xilinx_pcie_ops;  in xilinx_pcie_probe()
604 	{ .compatible = "xlnx,axi-pcie-host-1.00.a", },
610 		.name = "xilinx-pcie",