129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
#ifdef __KERNEL__
|
|
#ifndef _ASM_PCI_BRIDGE_H
|
|
#define _ASM_PCI_BRIDGE_H
|
|
|
|
#include <linux/pci.h>
|
|
|
|
/*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
/*
|
|
* Structure of a PCI controller (host bridge)
|
|
*/
|
|
struct pci_controller {
|
|
struct pci_bus *bus;
|
|
char is_dynamic;
|
|
void *arch_data;
|
|
struct list_head list_node;
|
|
|
|
int first_busno;
|
|
int last_busno;
|
|
|
|
void __iomem *io_base_virt;
|
|
unsigned long io_base_phys;
|
|
|
|
/* Some machines have a non 1:1 mapping of
|
|
* the PCI memory space in the CPU bus space
|
|
*/
|
|
unsigned long pci_mem_offset;
|
|
unsigned long pci_io_size;
|
|
|
|
struct pci_ops *ops;
|
|
volatile unsigned int __iomem *cfg_addr;
|
|
volatile unsigned char __iomem *cfg_data;
|
|
|
|
/* Currently, we limit ourselves to 1 IO range and 3 mem
|
|
* ranges since the common pci_bus structure can't handle more
|
|
*/
|
|
struct resource io_resource;
|
|
struct resource mem_resources[3];
|
|
int global_number;
|
|
int local_number;
|
|
unsigned long buid;
|
|
unsigned long dma_window_base_cur;
|
|
unsigned long dma_window_size;
|
|
};
|
|
|
|
/*
|
|
* PCI stuff, for nodes representing PCI devices, pointed to
|
|
* by device_node->data.
|
|
*/
|
|
struct pci_controller;
|
|
struct iommu_table;
|
|
|
|
struct pci_dn {
|
|
int busno; /* for pci devices */
|
|
int bussubno; /* for pci devices */
|
|
int devfn; /* for pci devices */
|
|
int eeh_mode; /* See eeh.h for possible EEH_MODEs */
|
|
int eeh_config_addr;
|
|
int eeh_capable; /* from firmware */
|
|
int eeh_check_count; /* # times driver ignored error */
|
|
int eeh_freeze_count; /* # times this device froze up. */
|
|
int eeh_is_bridge; /* device is pci-to-pci bridge */
|
|
|
|
int pci_ext_config_space; /* for pci devices */
|
|
struct pci_controller *phb; /* for pci devices */
|
|
struct iommu_table *iommu_table; /* for phb's or bridges */
|
|
struct pci_dev *pcidev; /* back-pointer to the pci device */
|
|
struct device_node *node; /* back-pointer to the device_node */
|
|
u32 config_space[16]; /* saved PCI config space */
|
|
};
|
|
|
|
/* Get the pointer to a device_node's pci_dn */
|
|
#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
|
|
|
|
struct device_node *fetch_dev_dn(struct pci_dev *dev);
|
|
|
|
/* Get a device_node from a pci_dev. This code must be fast except
|
|
* in the case where the sysdata is incorrect and needs to be fixed
|
|
* up (this will only happen once).
|
|
* In this case the sysdata will have been inherited from a PCI host
|
|
* bridge or a PCI-PCI bridge further up the tree, so it will point
|
|
* to a valid struct pci_dn, just not the one we want.
|
|
*/
|
|
static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
|
|
{
|
|
struct device_node *dn = dev->sysdata;
|
|
struct pci_dn *pdn = dn->data;
|
|
|
|
if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
|
|
return dn; /* fast path. sysdata is good */
|
|
return fetch_dev_dn(dev);
|
|
}
|
|
|
|
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
|
|
{
|
|
if (bus->self)
|
|
return pci_device_to_OF_node(bus->self);
|
|
else
|
|
return bus->sysdata; /* Must be root bus (PHB) */
|
|
}
|
|
|
|
extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
|
|
struct device_node *dev);
|
|
|
|
extern int pcibios_remove_root_bus(struct pci_controller *phb);
|
|
|
|
extern void phbs_remap_io(void);
|
|
|
|
static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
|
|
{
|
|
struct device_node *busdn = bus->sysdata;
|
|
|
|
BUG_ON(busdn == NULL);
|
|
return PCI_DN(busdn)->phb;
|
|
}
|
|
|
|
/* Return values for ppc_md.pci_probe_mode function */
|
|
#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
|
|
#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
|
|
#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
|
|
|
|
#endif
|
|
#endif /* __KERNEL__ */
|