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linux/arch/powerpc/include/asm/pci-bridge.h
Daniel Axtens ff9df8c87d powerpc: Create pci_controller_ops.probe_mode and shim 
Add pci_controller_ops.probe_mode, shadowing ppc_md.pci_probe_mode.
Add a shim, and changes the callsites to use the shim.

We also need to move the probe mode defines to pci-bridge.h from pci.h.
They are required by the shim in order to return a sensible default.
Previously, the were defined in pci.h, but pci.h includes pci-bridge.h
before the relevant #defines. This means the definitions are absent
if pci.h is included before pci-bridge.h. This occurs in some drivers.
So, move the definitons now, and move them back when we remove the shim.

Anything that wants the defines would have had to include pci.h, and
since pci.h includes pci-bridge.h, nothing will lose access to the
defines.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-04-11 20:49:12 +10:00

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#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>
#include <asm-generic/pci-bridge.h>
/* Return values for pci_controller_ops.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 */
struct device_node;
/*
* PCI controller operations
*/
struct pci_controller_ops {
void (*dma_dev_setup)(struct pci_dev *dev);
void (*dma_bus_setup)(struct pci_bus *bus);
int (*probe_mode)(struct pci_bus *);
};
/*
* 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;
int self_busno;
struct resource busn;
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 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_controller_ops controller_ops;
struct pci_ops *ops;
unsigned int __iomem *cfg_addr;
void __iomem *cfg_data;
/*
* 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 suppress 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.
* FSL_CFG_REG_LINK - Freescale controller version in which the PCIe
* link status is in a RC PCIe cfg register (vs being a SoC register)
*/
#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
#define PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK 0x00000040
u32 indirect_type;
/* 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];
resource_size_t mem_offset[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;
struct pci_dn *pci_data;
#endif /* CONFIG_PPC64 */
void *private_data;
};
/* 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);
extern int indirect_read_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 *val);
extern int __indirect_read_config(struct pci_controller *hose,
unsigned char bus_number, unsigned int devfn,
int offset, int len, u32 *val);
extern int indirect_write_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 val);
static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
{
return bus->sysdata;
}
#ifndef CONFIG_PPC64
extern int pci_device_from_OF_node(struct device_node *node,
u8 *bus, u8 *devfn);
extern void pci_create_OF_bus_map(void);
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;
}
#else /* CONFIG_PPC64 */
/*
* PCI stuff, for nodes representing PCI devices, pointed to
* by device_node->data.
*/
struct iommu_table;
struct pci_dn {
int flags;
int busno; /* pci bus number */
int devfn; /* pci device and function number */
int vendor_id; /* Vendor ID */
int device_id; /* Device ID */
int class_code; /* Device class code */
struct pci_dn *parent;
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 */
struct pci_dev *pcidev; /* back-pointer to the pci device */
#ifdef CONFIG_EEH
struct eeh_dev *edev; /* eeh device */
#endif
#define IODA_INVALID_PE (-1)
#ifdef CONFIG_PPC_POWERNV
int pe_number;
#endif
struct list_head child_list;
struct list_head list;
};
/* Get the pointer to a device_node's pci_dn */
#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus,
int devfn);
extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev);
extern void *update_dn_pci_info(struct device_node *dn, void *data);
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;
}
#if defined(CONFIG_EEH)
static inline struct eeh_dev *pdn_to_eeh_dev(struct pci_dn *pdn)
{
return pdn ? pdn->edev : NULL;
}
#else
#define pdn_to_eeh_dev(x) (NULL)
#endif
/** 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);
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);
#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);
#ifdef CONFIG_PCI
extern int pcibios_vaddr_is_ioport(void __iomem *address);
#else
static inline int pcibios_vaddr_is_ioport(void __iomem *address)
{
return 0;
}
#endif /* CONFIG_PCI */
/*
* Shims to prefer pci_controller version over ppc_md where available.
*/
static inline void pci_dma_dev_setup(struct pci_dev *dev)
{
struct pci_controller *phb = pci_bus_to_host(dev->bus);
if (phb->controller_ops.dma_dev_setup)
phb->controller_ops.dma_dev_setup(dev);
else if (ppc_md.pci_dma_dev_setup)
ppc_md.pci_dma_dev_setup(dev);
}
static inline void pci_dma_bus_setup(struct pci_bus *bus)
{
struct pci_controller *phb = pci_bus_to_host(bus);
if (phb->controller_ops.dma_bus_setup)
phb->controller_ops.dma_bus_setup(bus);
else if (ppc_md.pci_dma_bus_setup)
ppc_md.pci_dma_bus_setup(bus);
}
static inline int pci_probe_mode(struct pci_bus *bus)
{
struct pci_controller *phb = pci_bus_to_host(bus);
if (phb->controller_ops.probe_mode)
return phb->controller_ops.probe_mode(bus);
if (ppc_md.pci_probe_mode)
return ppc_md.pci_probe_mode(bus);
return PCI_PROBE_NORMAL;
}
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_PCI_BRIDGE_H */
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