#ifndef _ASM_POWERPC_PCI_BRIDGE_H
#define _ASM_POWERPC_PCI_BRIDGE_H
#ifdef __KERNEL__
/*
* 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.
*/
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/ioport.h>
struct device_node;
enum {
/* Force re-assigning all resources (ignore firmware
* setup completely)
*/
PPC_PCI_REASSIGN_ALL_RSRC = 0x00000001,
/* Re-assign all bus numbers */
PPC_PCI_REASSIGN_ALL_BUS = 0x00000002,
/* Do not try to assign, just use existing setup */
PPC_PCI_PROBE_ONLY = 0x00000004,
/* Don't bother with ISA alignment unless the bridge has
* ISA forwarding enabled
*/
PPC_PCI_CAN_SKIP_ISA_ALIGN = 0x00000008,
/* Enable domain numbers in /proc */
PPC_PCI_ENABLE_PROC_DOMAINS = 0x00000010,
/* ... except for domain 0 */
PPC_PCI_COMPAT_DOMAIN_0 = 0x00000020,
};
#ifdef CONFIG_PCI
extern unsigned int ppc_pci_flags;
static inline void ppc_pci_set_flags(int flags)
{
ppc_pci_flags = flags;
}
static inline void ppc_pci_add_flags(int flags)
{
ppc_pci_flags |= flags;
}
static inline int ppc_pci_has_flag(int flag)
{
return (ppc_pci_flags & flag);
}
#else
static inline void ppc_pci_set_flags(int flags) { }
static inline void ppc_pci_add_flags(int flags) { }
static inline int ppc_pci_has_flag(int flag)
{
return 0;
}
#endif
/*
* Structure of a PCI controller (host bridge)
*/
struct pci_controller {
struct pci_bus *bus;
char is_dynamic;
#ifdef CONFIG_PPC64
int node;
#endif
struct device_node *dn;
struct list_head list_node;
struct device *parent;
int first_busno;
int last_busno;
#ifndef CONFIG_PPC64
int self_busno;
#endif
void __iomem *io_base_virt;
#ifdef CONFIG_PPC64
void *io_base_alloc;
#endif
resource_size_t io_base_phys;
resource_size_t pci_io_size;
/* Some machines (PReP) have a non 1:1 mapping of
* the PCI memory space in the CPU bus space
*/
resource_size_t pci_mem_offset;
/* Some machines have a special region to forward the ISA
* "memory" cycles such as VGA memory regions. Left to 0
* if unsupported
*/
resource_size_t isa_mem_phys;
resource_size_t isa_mem_size;
struct pci_ops *ops;
unsigned int __iomem *cfg_addr;
void __iomem *cfg_data;
#ifndef CONFIG_PPC64
/*
* Used for variants of PCI indirect handling and possible quirks:
* SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
* EXT_REG - provides access to PCI-e extended registers
* SURPRESS_PRIMARY_BUS - we surpress the setting of PCI_PRIMARY_BUS
* on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
* to determine which bus number to match on when generating type0
* config cycles
* NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
* hanging if we don't have link and try to do config cycles to
* anything but the PHB. Only allow talking to the PHB if this is
* set.
* BIG_ENDIAN - cfg_addr is a big endian register
* BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
* the PLB4. Effectively disable MRM commands by setting this.
*/
#define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
#define PPC_INDIRECT_TYPE_EXT_REG 0x00000002
#define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
#define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
#define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010
#define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020
u32 indirect_type;
#endif /* !CONFIG_PPC64 */
/* 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; /* PCI domain number */
resource_size_t dma_window_base_cur;
resource_size_t dma_window_size;
#ifdef CONFIG_PPC64
unsigned long buid;
void *private_data;
#endif /* CONFIG_PPC64 */
};
#ifndef CONFIG_PPC64
static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
{
return bus->sysdata;
}
static inline int isa_vaddr_is_ioport(void __iomem *address)
{
/* No specific ISA handling on ppc32 at this stage, it
* all goes through PCI
*/
return 0;
}
/* These are used for config access before all the PCI probing
has been done. */
extern int early_read_config_byte(struct pci_controller *hose, int bus,
int dev_fn, int where, u8 *val);
extern int early_read_config_word(struct pci_controller *hose, int bus,
int dev_fn, int where, u16 *val);
extern int early_read_config_dword(struct pci_controller *hose, int bus,
int dev_fn, int where, u32 *val);
extern int early_write_config_byte(struct pci_controller *hose, int bus,
int dev_fn, int where, u8 val);
extern int early_write_config_word(struct pci_controller *hose, int bus,
int dev_fn, int where, u16 val);
extern int early_write_config_dword(struct pci_controller *hose, int bus,
int dev_fn, int where, u32 val);
extern int early_find_capability(struct pci_controller *hose, int bus,
int dev_fn, int cap);
extern void setup_indirect_pci(struct pci_controller* hose,
resource_size_t cfg_addr,
resource_size_t cfg_data, u32 flags);
#else /* CONFIG_PPC64 */
/*
* PCI stuff, for nodes representing PCI devices, pointed to
* by device_node->data.
*/
struct iommu_table;
struct pci_dn {
int busno; /* pci bus number */
int devfn; /* pci device and function number */
struct pci_controller *phb; /* for pci devices */
struct iommu_table *iommu_table; /* for phb's or bridges */
struct device_node *node; /* back-pointer to the device_node */
int pci_ext_config_space; /* for pci devices */
#ifdef CONFIG_EEH
struct pci_dev *pcidev; /* back-pointer to the pci device */
int class_code; /* pci device class */
int eeh_mode; /* See eeh.h for possible EEH_MODEs */
int eeh_config_addr;
int eeh_pe_config_addr; /* new-style partition endpoint address */
int eeh_check_count; /* # times driver ignored error */
int eeh_freeze_count; /* # times this device froze up. */
int eeh_false_positives; /* # times this device reported #ff's */
u32 config_space[16]; /* saved PCI config space */
#endif
};
/* Get the pointer to a device_node's pci_dn */
#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
extern struct device_node *fetch_dev_dn(struct pci_dev *dev);
extern void * update_dn_pci_info(struct device_node *dn, void *data);
/* 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 int pci_device_from_OF_node(struct device_node *np,
u8 *bus, u8 *devfn)
{
if (!PCI_DN(np))
return -ENODEV;
*bus = PCI_DN(np)->busno;
*devfn = PCI_DN(np)->devfn;
return 0;
}
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) */
}
/** Find the bus corresponding to the indicated device node */
extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn);
/** Remove all of the PCI devices under this bus */
extern void pcibios_remove_pci_devices(struct pci_bus *bus);
/** Discover new pci devices under this bus, and add them */
extern void pcibios_add_pci_devices(struct pci_bus *bus);
static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
{
struct device_node *busdn = bus->sysdata;
BUG_ON(busdn == NULL);
return PCI_DN(busdn)->phb;
}
extern void isa_bridge_find_early(struct pci_controller *hose);
static inline int isa_vaddr_is_ioport(void __iomem *address)
{
/* Check if address hits the reserved legacy IO range */
unsigned long ea = (unsigned long)address;
return ea >= ISA_IO_BASE && ea < ISA_IO_END;
}
extern int pcibios_unmap_io_space(struct pci_bus *bus);
extern int pcibios_map_io_space(struct pci_bus *bus);
/* 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 */
#ifdef CONFIG_NUMA
#define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
#else
#define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
#endif
#endif /* CONFIG_PPC64 */
/* Get the PCI host controller for an OF device */
extern struct pci_controller *pci_find_hose_for_OF_device(
struct device_node* node);
/* Fill up host controller resources from the OF node */
extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
struct device_node *dev, int primary);
/* Allocate & free a PCI host bridge structure */
extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
extern void pcibios_free_controller(struct pci_controller *phb);
extern void pcibios_setup_phb_resources(struct pci_controller *hose);
#ifdef CONFIG_PCI
extern unsigned long pci_address_to_pio(phys_addr_t address);
extern int pcibios_vaddr_is_ioport(void __iomem *address);
#else
static inline unsigned long pci_address_to_pio(phys_addr_t address)
{
return (unsigned long)-1;
}
static inline int pcibios_vaddr_is_ioport(void __iomem *address)
{
return 0;
}
#endif /* CONFIG_PCI */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_PCI_BRIDGE_H */
