| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * PCIe host controller driver for Xilinx AXI PCIe Bridge |
| * |
| * Copyright (c) 2012 - 2014 Xilinx, Inc. |
| * |
| * Based on the Tegra PCIe driver |
| * |
| * Bits taken from Synopsys DesignWare Host controller driver and |
| * ARM PCI Host generic driver. |
| */ |
| |
| #include <linux/interrupt.h> |
| #include <linux/irq.h> |
| #include <linux/irqdomain.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/msi.h> |
| #include <linux/of_address.h> |
| #include <linux/of_pci.h> |
| #include <linux/of_platform.h> |
| #include <linux/of_irq.h> |
| #include <linux/pci.h> |
| #include <linux/platform_device.h> |
| |
| #include "../pci.h" |
| |
| /* Register definitions */ |
| #define XILINX_PCIE_REG_BIR 0x00000130 |
| #define XILINX_PCIE_REG_IDR 0x00000138 |
| #define XILINX_PCIE_REG_IMR 0x0000013c |
| #define XILINX_PCIE_REG_PSCR 0x00000144 |
| #define XILINX_PCIE_REG_RPSC 0x00000148 |
| #define XILINX_PCIE_REG_MSIBASE1 0x0000014c |
| #define XILINX_PCIE_REG_MSIBASE2 0x00000150 |
| #define XILINX_PCIE_REG_RPEFR 0x00000154 |
| #define XILINX_PCIE_REG_RPIFR1 0x00000158 |
| #define XILINX_PCIE_REG_RPIFR2 0x0000015c |
| |
| /* Interrupt registers definitions */ |
| #define XILINX_PCIE_INTR_LINK_DOWN BIT(0) |
| #define XILINX_PCIE_INTR_ECRC_ERR BIT(1) |
| #define XILINX_PCIE_INTR_STR_ERR BIT(2) |
| #define XILINX_PCIE_INTR_HOT_RESET BIT(3) |
| #define XILINX_PCIE_INTR_CFG_TIMEOUT BIT(8) |
| #define XILINX_PCIE_INTR_CORRECTABLE BIT(9) |
| #define XILINX_PCIE_INTR_NONFATAL BIT(10) |
| #define XILINX_PCIE_INTR_FATAL BIT(11) |
| #define XILINX_PCIE_INTR_INTX BIT(16) |
| #define XILINX_PCIE_INTR_MSI BIT(17) |
| #define XILINX_PCIE_INTR_SLV_UNSUPP BIT(20) |
| #define XILINX_PCIE_INTR_SLV_UNEXP BIT(21) |
| #define XILINX_PCIE_INTR_SLV_COMPL BIT(22) |
| #define XILINX_PCIE_INTR_SLV_ERRP BIT(23) |
| #define XILINX_PCIE_INTR_SLV_CMPABT BIT(24) |
| #define XILINX_PCIE_INTR_SLV_ILLBUR BIT(25) |
| #define XILINX_PCIE_INTR_MST_DECERR BIT(26) |
| #define XILINX_PCIE_INTR_MST_SLVERR BIT(27) |
| #define XILINX_PCIE_INTR_MST_ERRP BIT(28) |
| #define XILINX_PCIE_IMR_ALL_MASK 0x1FF30FED |
| #define XILINX_PCIE_IMR_ENABLE_MASK 0x1FF30F0D |
| #define XILINX_PCIE_IDR_ALL_MASK 0xFFFFFFFF |
| |
| /* Root Port Error FIFO Read Register definitions */ |
| #define XILINX_PCIE_RPEFR_ERR_VALID BIT(18) |
| #define XILINX_PCIE_RPEFR_REQ_ID GENMASK(15, 0) |
| #define XILINX_PCIE_RPEFR_ALL_MASK 0xFFFFFFFF |
| |
| /* Root Port Interrupt FIFO Read Register 1 definitions */ |
| #define XILINX_PCIE_RPIFR1_INTR_VALID BIT(31) |
| #define XILINX_PCIE_RPIFR1_MSI_INTR BIT(30) |
| #define XILINX_PCIE_RPIFR1_INTR_MASK GENMASK(28, 27) |
| #define XILINX_PCIE_RPIFR1_ALL_MASK 0xFFFFFFFF |
| #define XILINX_PCIE_RPIFR1_INTR_SHIFT 27 |
| |
| /* Bridge Info Register definitions */ |
| #define XILINX_PCIE_BIR_ECAM_SZ_MASK GENMASK(18, 16) |
| #define XILINX_PCIE_BIR_ECAM_SZ_SHIFT 16 |
| |
| /* Root Port Interrupt FIFO Read Register 2 definitions */ |
| #define XILINX_PCIE_RPIFR2_MSG_DATA GENMASK(15, 0) |
| |
| /* Root Port Status/control Register definitions */ |
| #define XILINX_PCIE_REG_RPSC_BEN BIT(0) |
| |
| /* Phy Status/Control Register definitions */ |
| #define XILINX_PCIE_REG_PSCR_LNKUP BIT(11) |
| |
| /* ECAM definitions */ |
| #define ECAM_BUS_NUM_SHIFT 20 |
| #define ECAM_DEV_NUM_SHIFT 12 |
| |
| /* Number of MSI IRQs */ |
| #define XILINX_NUM_MSI_IRQS 128 |
| |
| /** |
| * struct xilinx_pcie_port - PCIe port information |
| * @reg_base: IO Mapped Register Base |
| * @irq: Interrupt number |
| * @msi_pages: MSI pages |
| * @root_busno: Root Bus number |
| * @dev: Device pointer |
| * @msi_domain: MSI IRQ domain pointer |
| * @leg_domain: Legacy IRQ domain pointer |
| * @resources: Bus Resources |
| */ |
| struct xilinx_pcie_port { |
| void __iomem *reg_base; |
| u32 irq; |
| unsigned long msi_pages; |
| u8 root_busno; |
| struct device *dev; |
| struct irq_domain *msi_domain; |
| struct irq_domain *leg_domain; |
| struct list_head resources; |
| }; |
| |
| static DECLARE_BITMAP(msi_irq_in_use, XILINX_NUM_MSI_IRQS); |
| |
| static inline u32 pcie_read(struct xilinx_pcie_port *port, u32 reg) |
| { |
| return readl(port->reg_base + reg); |
| } |
| |
| static inline void pcie_write(struct xilinx_pcie_port *port, u32 val, u32 reg) |
| { |
| writel(val, port->reg_base + reg); |
| } |
| |
| static inline bool xilinx_pcie_link_up(struct xilinx_pcie_port *port) |
| { |
| return (pcie_read(port, XILINX_PCIE_REG_PSCR) & |
| XILINX_PCIE_REG_PSCR_LNKUP) ? 1 : 0; |
| } |
| |
| /** |
| * xilinx_pcie_clear_err_interrupts - Clear Error Interrupts |
| * @port: PCIe port information |
| */ |
| static void xilinx_pcie_clear_err_interrupts(struct xilinx_pcie_port *port) |
| { |
| struct device *dev = port->dev; |
| unsigned long val = pcie_read(port, XILINX_PCIE_REG_RPEFR); |
| |
| if (val & XILINX_PCIE_RPEFR_ERR_VALID) { |
| dev_dbg(dev, "Requester ID %lu\n", |
| val & XILINX_PCIE_RPEFR_REQ_ID); |
| pcie_write(port, XILINX_PCIE_RPEFR_ALL_MASK, |
| XILINX_PCIE_REG_RPEFR); |
| } |
| } |
| |
| /** |
| * xilinx_pcie_valid_device - Check if a valid device is present on bus |
| * @bus: PCI Bus structure |
| * @devfn: device/function |
| * |
| * Return: 'true' on success and 'false' if invalid device is found |
| */ |
| static bool xilinx_pcie_valid_device(struct pci_bus *bus, unsigned int devfn) |
| { |
| struct xilinx_pcie_port *port = bus->sysdata; |
| |
| /* Check if link is up when trying to access downstream ports */ |
| if (bus->number != port->root_busno) |
| if (!xilinx_pcie_link_up(port)) |
| return false; |
| |
| /* Only one device down on each root port */ |
| if (bus->number == port->root_busno && devfn > 0) |
| return false; |
| |
| return true; |
| } |
| |
| /** |
| * xilinx_pcie_map_bus - Get configuration base |
| * @bus: PCI Bus structure |
| * @devfn: Device/function |
| * @where: Offset from base |
| * |
| * Return: Base address of the configuration space needed to be |
| * accessed. |
| */ |
| static void __iomem *xilinx_pcie_map_bus(struct pci_bus *bus, |
| unsigned int devfn, int where) |
| { |
| struct xilinx_pcie_port *port = bus->sysdata; |
| int relbus; |
| |
| if (!xilinx_pcie_valid_device(bus, devfn)) |
| return NULL; |
| |
| relbus = (bus->number << ECAM_BUS_NUM_SHIFT) | |
| (devfn << ECAM_DEV_NUM_SHIFT); |
| |
| return port->reg_base + relbus + where; |
| } |
| |
| /* PCIe operations */ |
| static struct pci_ops xilinx_pcie_ops = { |
| .map_bus = xilinx_pcie_map_bus, |
| .read = pci_generic_config_read, |
| .write = pci_generic_config_write, |
| }; |
| |
| /* MSI functions */ |
| |
| /** |
| * xilinx_pcie_destroy_msi - Free MSI number |
| * @irq: IRQ to be freed |
| */ |
| static void xilinx_pcie_destroy_msi(unsigned int irq) |
| { |
| struct msi_desc *msi; |
| struct xilinx_pcie_port *port; |
| struct irq_data *d = irq_get_irq_data(irq); |
| irq_hw_number_t hwirq = irqd_to_hwirq(d); |
| |
| if (!test_bit(hwirq, msi_irq_in_use)) { |
| msi = irq_get_msi_desc(irq); |
| port = msi_desc_to_pci_sysdata(msi); |
| dev_err(port->dev, "Trying to free unused MSI#%d\n", irq); |
| } else { |
| clear_bit(hwirq, msi_irq_in_use); |
| } |
| } |
| |
| /** |
| * xilinx_pcie_assign_msi - Allocate MSI number |
| * |
| * Return: A valid IRQ on success and error value on failure. |
| */ |
| static int xilinx_pcie_assign_msi(void) |
| { |
| int pos; |
| |
| pos = find_first_zero_bit(msi_irq_in_use, XILINX_NUM_MSI_IRQS); |
| if (pos < XILINX_NUM_MSI_IRQS) |
| set_bit(pos, msi_irq_in_use); |
| else |
| return -ENOSPC; |
| |
| return pos; |
| } |
| |
| /** |
| * xilinx_msi_teardown_irq - Destroy the MSI |
| * @chip: MSI Chip descriptor |
| * @irq: MSI IRQ to destroy |
| */ |
| static void xilinx_msi_teardown_irq(struct msi_controller *chip, |
| unsigned int irq) |
| { |
| xilinx_pcie_destroy_msi(irq); |
| irq_dispose_mapping(irq); |
| } |
| |
| /** |
| * xilinx_pcie_msi_setup_irq - Setup MSI request |
| * @chip: MSI chip pointer |
| * @pdev: PCIe device pointer |
| * @desc: MSI descriptor pointer |
| * |
| * Return: '0' on success and error value on failure |
| */ |
| static int xilinx_pcie_msi_setup_irq(struct msi_controller *chip, |
| struct pci_dev *pdev, |
| struct msi_desc *desc) |
| { |
| struct xilinx_pcie_port *port = pdev->bus->sysdata; |
| unsigned int irq; |
| int hwirq; |
| struct msi_msg msg; |
| phys_addr_t msg_addr; |
| |
| hwirq = xilinx_pcie_assign_msi(); |
| if (hwirq < 0) |
| return hwirq; |
| |
| irq = irq_create_mapping(port->msi_domain, hwirq); |
| if (!irq) |
| return -EINVAL; |
| |
| irq_set_msi_desc(irq, desc); |
| |
| msg_addr = virt_to_phys((void *)port->msi_pages); |
| |
| msg.address_hi = 0; |
| msg.address_lo = msg_addr; |
| msg.data = irq; |
| |
| pci_write_msi_msg(irq, &msg); |
| |
| return 0; |
| } |
| |
| /* MSI Chip Descriptor */ |
| static struct msi_controller xilinx_pcie_msi_chip = { |
| .setup_irq = xilinx_pcie_msi_setup_irq, |
| .teardown_irq = xilinx_msi_teardown_irq, |
| }; |
| |
| /* HW Interrupt Chip Descriptor */ |
| static struct irq_chip xilinx_msi_irq_chip = { |
| .name = "Xilinx PCIe MSI", |
| .irq_enable = pci_msi_unmask_irq, |
| .irq_disable = pci_msi_mask_irq, |
| .irq_mask = pci_msi_mask_irq, |
| .irq_unmask = pci_msi_unmask_irq, |
| }; |
| |
| /** |
| * xilinx_pcie_msi_map - Set the handler for the MSI and mark IRQ as valid |
| * @domain: IRQ domain |
| * @irq: Virtual IRQ number |
| * @hwirq: HW interrupt number |
| * |
| * Return: Always returns 0. |
| */ |
| static int xilinx_pcie_msi_map(struct irq_domain *domain, unsigned int irq, |
| irq_hw_number_t hwirq) |
| { |
| irq_set_chip_and_handler(irq, &xilinx_msi_irq_chip, handle_simple_irq); |
| irq_set_chip_data(irq, domain->host_data); |
| |
| return 0; |
| } |
| |
| /* IRQ Domain operations */ |
| static const struct irq_domain_ops msi_domain_ops = { |
| .map = xilinx_pcie_msi_map, |
| }; |
| |
| /** |
| * xilinx_pcie_enable_msi - Enable MSI support |
| * @port: PCIe port information |
| */ |
| static int xilinx_pcie_enable_msi(struct xilinx_pcie_port *port) |
| { |
| phys_addr_t msg_addr; |
| |
| port->msi_pages = __get_free_pages(GFP_KERNEL, 0); |
| if (!port->msi_pages) |
| return -ENOMEM; |
| |
| msg_addr = virt_to_phys((void *)port->msi_pages); |
| pcie_write(port, 0x0, XILINX_PCIE_REG_MSIBASE1); |
| pcie_write(port, msg_addr, XILINX_PCIE_REG_MSIBASE2); |
| |
| return 0; |
| } |
| |
| /* INTx Functions */ |
| |
| /** |
| * xilinx_pcie_intx_map - Set the handler for the INTx and mark IRQ as valid |
| * @domain: IRQ domain |
| * @irq: Virtual IRQ number |
| * @hwirq: HW interrupt number |
| * |
| * Return: Always returns 0. |
| */ |
| static int xilinx_pcie_intx_map(struct irq_domain *domain, unsigned int irq, |
| irq_hw_number_t hwirq) |
| { |
| irq_set_chip_and_handler(irq, &dummy_irq_chip, handle_simple_irq); |
| irq_set_chip_data(irq, domain->host_data); |
| |
| return 0; |
| } |
| |
| /* INTx IRQ Domain operations */ |
| static const struct irq_domain_ops intx_domain_ops = { |
| .map = xilinx_pcie_intx_map, |
| .xlate = pci_irqd_intx_xlate, |
| }; |
| |
| /* PCIe HW Functions */ |
| |
| /** |
| * xilinx_pcie_intr_handler - Interrupt Service Handler |
| * @irq: IRQ number |
| * @data: PCIe port information |
| * |
| * Return: IRQ_HANDLED on success and IRQ_NONE on failure |
| */ |
| static irqreturn_t xilinx_pcie_intr_handler(int irq, void *data) |
| { |
| struct xilinx_pcie_port *port = (struct xilinx_pcie_port *)data; |
| struct device *dev = port->dev; |
| u32 val, mask, status; |
| |
| /* Read interrupt decode and mask registers */ |
| val = pcie_read(port, XILINX_PCIE_REG_IDR); |
| mask = pcie_read(port, XILINX_PCIE_REG_IMR); |
| |
| status = val & mask; |
| if (!status) |
| return IRQ_NONE; |
| |
| if (status & XILINX_PCIE_INTR_LINK_DOWN) |
| dev_warn(dev, "Link Down\n"); |
| |
| if (status & XILINX_PCIE_INTR_ECRC_ERR) |
| dev_warn(dev, "ECRC failed\n"); |
| |
| if (status & XILINX_PCIE_INTR_STR_ERR) |
| dev_warn(dev, "Streaming error\n"); |
| |
| if (status & XILINX_PCIE_INTR_HOT_RESET) |
| dev_info(dev, "Hot reset\n"); |
| |
| if (status & XILINX_PCIE_INTR_CFG_TIMEOUT) |
| dev_warn(dev, "ECAM access timeout\n"); |
| |
| if (status & XILINX_PCIE_INTR_CORRECTABLE) { |
| dev_warn(dev, "Correctable error message\n"); |
| xilinx_pcie_clear_err_interrupts(port); |
| } |
| |
| if (status & XILINX_PCIE_INTR_NONFATAL) { |
| dev_warn(dev, "Non fatal error message\n"); |
| xilinx_pcie_clear_err_interrupts(port); |
| } |
| |
| if (status & XILINX_PCIE_INTR_FATAL) { |
| dev_warn(dev, "Fatal error message\n"); |
| xilinx_pcie_clear_err_interrupts(port); |
| } |
| |
| if (status & (XILINX_PCIE_INTR_INTX | XILINX_PCIE_INTR_MSI)) { |
| val = pcie_read(port, XILINX_PCIE_REG_RPIFR1); |
| |
| /* Check whether interrupt valid */ |
| if (!(val & XILINX_PCIE_RPIFR1_INTR_VALID)) { |
| dev_warn(dev, "RP Intr FIFO1 read error\n"); |
| goto error; |
| } |
| |
| /* Decode the IRQ number */ |
| if (val & XILINX_PCIE_RPIFR1_MSI_INTR) { |
| val = pcie_read(port, XILINX_PCIE_REG_RPIFR2) & |
| XILINX_PCIE_RPIFR2_MSG_DATA; |
| } else { |
| val = (val & XILINX_PCIE_RPIFR1_INTR_MASK) >> |
| XILINX_PCIE_RPIFR1_INTR_SHIFT; |
| val = irq_find_mapping(port->leg_domain, val); |
| } |
| |
| /* Clear interrupt FIFO register 1 */ |
| pcie_write(port, XILINX_PCIE_RPIFR1_ALL_MASK, |
| XILINX_PCIE_REG_RPIFR1); |
| |
| /* Handle the interrupt */ |
| if (IS_ENABLED(CONFIG_PCI_MSI) || |
| !(val & XILINX_PCIE_RPIFR1_MSI_INTR)) |
| generic_handle_irq(val); |
| } |
| |
| if (status & XILINX_PCIE_INTR_SLV_UNSUPP) |
| dev_warn(dev, "Slave unsupported request\n"); |
| |
| if (status & XILINX_PCIE_INTR_SLV_UNEXP) |
| dev_warn(dev, "Slave unexpected completion\n"); |
| |
| if (status & XILINX_PCIE_INTR_SLV_COMPL) |
| dev_warn(dev, "Slave completion timeout\n"); |
| |
| if (status & XILINX_PCIE_INTR_SLV_ERRP) |
| dev_warn(dev, "Slave Error Poison\n"); |
| |
| if (status & XILINX_PCIE_INTR_SLV_CMPABT) |
| dev_warn(dev, "Slave Completer Abort\n"); |
| |
| if (status & XILINX_PCIE_INTR_SLV_ILLBUR) |
| dev_warn(dev, "Slave Illegal Burst\n"); |
| |
| if (status & XILINX_PCIE_INTR_MST_DECERR) |
| dev_warn(dev, "Master decode error\n"); |
| |
| if (status & XILINX_PCIE_INTR_MST_SLVERR) |
| dev_warn(dev, "Master slave error\n"); |
| |
| if (status & XILINX_PCIE_INTR_MST_ERRP) |
| dev_warn(dev, "Master error poison\n"); |
| |
| error: |
| /* Clear the Interrupt Decode register */ |
| pcie_write(port, status, XILINX_PCIE_REG_IDR); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * xilinx_pcie_init_irq_domain - Initialize IRQ domain |
| * @port: PCIe port information |
| * |
| * Return: '0' on success and error value on failure |
| */ |
| static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port) |
| { |
| struct device *dev = port->dev; |
| struct device_node *node = dev->of_node; |
| struct device_node *pcie_intc_node; |
| int ret; |
| |
| /* Setup INTx */ |
| pcie_intc_node = of_get_next_child(node, NULL); |
| if (!pcie_intc_node) { |
| dev_err(dev, "No PCIe Intc node found\n"); |
| return -ENODEV; |
| } |
| |
| port->leg_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX, |
| &intx_domain_ops, |
| port); |
| of_node_put(pcie_intc_node); |
| if (!port->leg_domain) { |
| dev_err(dev, "Failed to get a INTx IRQ domain\n"); |
| return -ENODEV; |
| } |
| |
| /* Setup MSI */ |
| if (IS_ENABLED(CONFIG_PCI_MSI)) { |
| port->msi_domain = irq_domain_add_linear(node, |
| XILINX_NUM_MSI_IRQS, |
| &msi_domain_ops, |
| &xilinx_pcie_msi_chip); |
| if (!port->msi_domain) { |
| dev_err(dev, "Failed to get a MSI IRQ domain\n"); |
| return -ENODEV; |
| } |
| |
| ret = xilinx_pcie_enable_msi(port); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * xilinx_pcie_init_port - Initialize hardware |
| * @port: PCIe port information |
| */ |
| static void xilinx_pcie_init_port(struct xilinx_pcie_port *port) |
| { |
| struct device *dev = port->dev; |
| |
| if (xilinx_pcie_link_up(port)) |
| dev_info(dev, "PCIe Link is UP\n"); |
| else |
| dev_info(dev, "PCIe Link is DOWN\n"); |
| |
| /* Disable all interrupts */ |
| pcie_write(port, ~XILINX_PCIE_IDR_ALL_MASK, |
| XILINX_PCIE_REG_IMR); |
| |
| /* Clear pending interrupts */ |
| pcie_write(port, pcie_read(port, XILINX_PCIE_REG_IDR) & |
| XILINX_PCIE_IMR_ALL_MASK, |
| XILINX_PCIE_REG_IDR); |
| |
| /* Enable all interrupts we handle */ |
| pcie_write(port, XILINX_PCIE_IMR_ENABLE_MASK, XILINX_PCIE_REG_IMR); |
| |
| /* Enable the Bridge enable bit */ |
| pcie_write(port, pcie_read(port, XILINX_PCIE_REG_RPSC) | |
| XILINX_PCIE_REG_RPSC_BEN, |
| XILINX_PCIE_REG_RPSC); |
| } |
| |
| /** |
| * xilinx_pcie_parse_dt - Parse Device tree |
| * @port: PCIe port information |
| * |
| * Return: '0' on success and error value on failure |
| */ |
| static int xilinx_pcie_parse_dt(struct xilinx_pcie_port *port) |
| { |
| struct device *dev = port->dev; |
| struct device_node *node = dev->of_node; |
| struct resource regs; |
| int err; |
| |
| err = of_address_to_resource(node, 0, ®s); |
| if (err) { |
| dev_err(dev, "missing \"reg\" property\n"); |
| return err; |
| } |
| |
| port->reg_base = devm_pci_remap_cfg_resource(dev, ®s); |
| if (IS_ERR(port->reg_base)) |
| return PTR_ERR(port->reg_base); |
| |
| port->irq = irq_of_parse_and_map(node, 0); |
| err = devm_request_irq(dev, port->irq, xilinx_pcie_intr_handler, |
| IRQF_SHARED | IRQF_NO_THREAD, |
| "xilinx-pcie", port); |
| if (err) { |
| dev_err(dev, "unable to request irq %d\n", port->irq); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * xilinx_pcie_probe - Probe function |
| * @pdev: Platform device pointer |
| * |
| * Return: '0' on success and error value on failure |
| */ |
| static int xilinx_pcie_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct xilinx_pcie_port *port; |
| struct pci_bus *bus, *child; |
| struct pci_host_bridge *bridge; |
| int err; |
| resource_size_t iobase = 0; |
| LIST_HEAD(res); |
| |
| if (!dev->of_node) |
| return -ENODEV; |
| |
| bridge = devm_pci_alloc_host_bridge(dev, sizeof(*port)); |
| if (!bridge) |
| return -ENODEV; |
| |
| port = pci_host_bridge_priv(bridge); |
| |
| port->dev = dev; |
| |
| err = xilinx_pcie_parse_dt(port); |
| if (err) { |
| dev_err(dev, "Parsing DT failed\n"); |
| return err; |
| } |
| |
| xilinx_pcie_init_port(port); |
| |
| err = xilinx_pcie_init_irq_domain(port); |
| if (err) { |
| dev_err(dev, "Failed creating IRQ Domain\n"); |
| return err; |
| } |
| |
| err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff, &res, |
| &iobase); |
| if (err) { |
| dev_err(dev, "Getting bridge resources failed\n"); |
| return err; |
| } |
| |
| err = devm_request_pci_bus_resources(dev, &res); |
| if (err) |
| goto error; |
| |
| |
| list_splice_init(&res, &bridge->windows); |
| bridge->dev.parent = dev; |
| bridge->sysdata = port; |
| bridge->busnr = 0; |
| bridge->ops = &xilinx_pcie_ops; |
| bridge->map_irq = of_irq_parse_and_map_pci; |
| bridge->swizzle_irq = pci_common_swizzle; |
| |
| #ifdef CONFIG_PCI_MSI |
| xilinx_pcie_msi_chip.dev = dev; |
| bridge->msi = &xilinx_pcie_msi_chip; |
| #endif |
| err = pci_scan_root_bus_bridge(bridge); |
| if (err < 0) |
| goto error; |
| |
| bus = bridge->bus; |
| |
| pci_assign_unassigned_bus_resources(bus); |
| list_for_each_entry(child, &bus->children, node) |
| pcie_bus_configure_settings(child); |
| pci_bus_add_devices(bus); |
| return 0; |
| |
| error: |
| pci_free_resource_list(&res); |
| return err; |
| } |
| |
| static const struct of_device_id xilinx_pcie_of_match[] = { |
| { .compatible = "xlnx,axi-pcie-host-1.00.a", }, |
| {} |
| }; |
| |
| static struct platform_driver xilinx_pcie_driver = { |
| .driver = { |
| .name = "xilinx-pcie", |
| .of_match_table = xilinx_pcie_of_match, |
| .suppress_bind_attrs = true, |
| }, |
| .probe = xilinx_pcie_probe, |
| }; |
| builtin_platform_driver(xilinx_pcie_driver); |