1 /* 2 * Copyright 2016 Broadcom 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License, version 2, as 6 * published by the Free Software Foundation (the "GPL"). 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License version 2 (GPLv2) for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * version 2 (GPLv2) along with this source code. 15 */ 16 #ifndef DRIVERS_PCI_ECAM_H 17 #define DRIVERS_PCI_ECAM_H 18 19 #include <linux/kernel.h> 20 #include <linux/platform_device.h> 21 22 /* 23 * struct to hold pci ops and bus shift of the config window 24 * for a PCI controller. 25 */ 26 struct pci_config_window; 27 struct pci_ecam_ops { 28 unsigned int bus_shift; 29 struct pci_ops pci_ops; 30 int (*init)(struct pci_config_window *); 31 }; 32 33 /* 34 * struct to hold the mappings of a config space window. This 35 * is expected to be used as sysdata for PCI controllers that 36 * use ECAM. 37 */ 38 struct pci_config_window { 39 struct resource res; 40 struct resource busr; 41 void *priv; 42 struct pci_ecam_ops *ops; 43 union { 44 void __iomem *win; /* 64-bit single mapping */ 45 void __iomem **winp; /* 32-bit per-bus mapping */ 46 }; 47 struct device *parent;/* ECAM res was from this dev */ 48 }; 49 50 /* create and free pci_config_window */ 51 struct pci_config_window *pci_ecam_create(struct device *dev, 52 struct resource *cfgres, struct resource *busr, 53 struct pci_ecam_ops *ops); 54 void pci_ecam_free(struct pci_config_window *cfg); 55 56 /* map_bus when ->sysdata is an instance of pci_config_window */ 57 void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn, 58 int where); 59 /* default ECAM ops */ 60 extern struct pci_ecam_ops pci_generic_ecam_ops; 61 62 #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS) 63 extern struct pci_ecam_ops pci_32b_ops; /* 32-bit accesses only */ 64 extern struct pci_ecam_ops hisi_pcie_ops; /* HiSilicon */ 65 extern struct pci_ecam_ops thunder_pem_ecam_ops; /* Cavium ThunderX 1.x & 2.x */ 66 extern struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */ 67 extern struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */ 68 extern struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */ 69 #endif 70 71 #ifdef CONFIG_PCI_HOST_GENERIC 72 /* for DT-based PCI controllers that support ECAM */ 73 int pci_host_common_probe(struct platform_device *pdev, 74 struct pci_ecam_ops *ops); 75 #endif 76 #endif 77