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TOMOYO Linux Cross Reference
Linux/include/linux/pci-ecam.h

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  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/pci.h>
 20 #include <linux/kernel.h>
 21 #include <linux/platform_device.h>
 22 
 23 /*
 24  * struct to hold pci ops and bus shift of the config window
 25  * for a PCI controller.
 26  */
 27 struct pci_config_window;
 28 struct pci_ecam_ops {
 29         unsigned int                    bus_shift;
 30         struct pci_ops                  pci_ops;
 31         int                             (*init)(struct pci_config_window *);
 32 };
 33 
 34 /*
 35  * struct to hold the mappings of a config space window. This
 36  * is expected to be used as sysdata for PCI controllers that
 37  * use ECAM.
 38  */
 39 struct pci_config_window {
 40         struct resource                 res;
 41         struct resource                 busr;
 42         void                            *priv;
 43         struct pci_ecam_ops             *ops;
 44         union {
 45                 void __iomem            *win;   /* 64-bit single mapping */
 46                 void __iomem            **winp; /* 32-bit per-bus mapping */
 47         };
 48         struct device                   *parent;/* ECAM res was from this dev */
 49 };
 50 
 51 /* create and free pci_config_window */
 52 struct pci_config_window *pci_ecam_create(struct device *dev,
 53                 struct resource *cfgres, struct resource *busr,
 54                 struct pci_ecam_ops *ops);
 55 void pci_ecam_free(struct pci_config_window *cfg);
 56 
 57 /* map_bus when ->sysdata is an instance of pci_config_window */
 58 void __iomem *pci_ecam_map_bus(struct pci_bus *bus, unsigned int devfn,
 59                                int where);
 60 /* default ECAM ops */
 61 extern struct pci_ecam_ops pci_generic_ecam_ops;
 62 
 63 #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS)
 64 extern struct pci_ecam_ops pci_32b_ops;         /* 32-bit accesses only */
 65 extern struct pci_ecam_ops hisi_pcie_ops;       /* HiSilicon */
 66 extern struct pci_ecam_ops thunder_pem_ecam_ops; /* Cavium ThunderX 1.x & 2.x */
 67 extern struct pci_ecam_ops pci_thunder_ecam_ops; /* Cavium ThunderX 1.x */
 68 extern struct pci_ecam_ops xgene_v1_pcie_ecam_ops; /* APM X-Gene PCIe v1 */
 69 extern struct pci_ecam_ops xgene_v2_pcie_ecam_ops; /* APM X-Gene PCIe v2.x */
 70 #endif
 71 
 72 #ifdef CONFIG_PCI_HOST_COMMON
 73 /* for DT-based PCI controllers that support ECAM */
 74 int pci_host_common_probe(struct platform_device *pdev,
 75                           struct pci_ecam_ops *ops);
 76 #endif
 77 #endif
 78 

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