| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | 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 | 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 struct pci_ecam_ops pci_generic_ecam_ops; |
| 51 | |
| 52 | #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS) |
| 53 | extern struct pci_ecam_ops pci_32b_ops; /* 32-bit accesses only */ |
| 54 | extern struct pci_ecam_ops hisi_pcie_ops; /* HiSilicon */ |
| 55 | extern struct pci_ecam_ops thunder_pem_ecam_ops; /* Cavium ThunderX 1.x & 2.x */ |
| 56 | extern struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */ |
| 57 | extern struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */ |
| 58 | extern struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */ |
| 59 | #endif |
| 60 | |
| 61 | #ifdef CONFIG_PCI_HOST_COMMON |
| 62 | /* for DT-based PCI controllers that support ECAM */ |
| 63 | int pci_host_common_probe(struct platform_device *pdev, |
| 64 | struct pci_ecam_ops *ops); |
| 65 | int pci_host_common_remove(struct platform_device *pdev); |
| 66 | #endif |
| 67 | #endif |