1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright 2016 Broadcom 4 */ 5 #ifndef DRIVERS_PCI_ECAM_H 6 #define DRIVERS_PCI_ECAM_H 7 8 #include <linux/pci.h> 9 #include <linux/kernel.h> 10 #include <linux/platform_device.h> 11 12 /* 13 * struct to hold pci ops and bus shift of the config window 14 * for a PCI controller. 15 */ 16 struct pci_config_window; 17 struct pci_ecam_ops { 18 unsigned int bus_shift; 19 struct pci_ops pci_ops; 20 int (*init)(struct pci_config_window *); 21 }; 22 23 /* 24 * struct to hold the mappings of a config space window. This 25 * is expected to be used as sysdata for PCI controllers that 26 * use ECAM. 27 */ 28 struct pci_config_window { 29 struct resource res; 30 struct resource busr; 31 void *priv; 32 const struct pci_ecam_ops *ops; 33 union { 34 void __iomem *win; /* 64-bit single mapping */ 35 void __iomem **winp; /* 32-bit per-bus mapping */ 36 }; 37 struct device *parent;/* ECAM res was from this dev */ 38 }; 39 40 /* create and free pci_config_window */ 41 struct pci_config_window *pci_ecam_create(struct device *dev, 42 struct resource *cfgres, struct resource *busr, 43 const struct pci_ecam_ops *ops); 44 void pci_ecam_free(struct pci_config_window *cfg); 45 46 /* map_bus when ->sysdata is an instance of pci_config_window */ 47 void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn, 48 int where); 49 /* default ECAM ops */ 50 extern const struct pci_ecam_ops pci_generic_ecam_ops; 51 52 #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS) 53 extern const struct pci_ecam_ops pci_32b_ops; /* 32-bit accesses only */ 54 extern const struct pci_ecam_ops pci_32b_read_ops; /* 32-bit read only */ 55 extern const struct pci_ecam_ops hisi_pcie_ops; /* HiSilicon */ 56 extern const struct pci_ecam_ops thunder_pem_ecam_ops; /* Cavium ThunderX 1.x & 2.x */ 57 extern const struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */ 58 extern const struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */ 59 extern const struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */ 60 extern const struct pci_ecam_ops al_pcie_ops; /* Amazon Annapurna Labs PCIe */ 61 #endif 62 63 #if IS_ENABLED(CONFIG_PCI_HOST_COMMON) 64 /* for DT-based PCI controllers that support ECAM */ 65 int pci_host_common_probe(struct platform_device *pdev); 66 int pci_host_common_remove(struct platform_device *pdev); 67 #endif 68 #endif 69