[linux-block.git] / include / asm-powerpc / pci-bridge.h

#ifndef _ASM_POWERPC_PCI_BRIDGE_H
#define _ASM_POWERPC_PCI_BRIDGE_H

#ifndef CONFIG_PPC64
#include <asm-ppc/pci-bridge.h>
#else

#include <linux/pci.h>
#include <linux/list.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 void __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 */

#ifdef CONFIG_PPC_PSERIES
	int	eeh_mode;		/* See eeh.h for possible EEH_MODEs */
	int	eeh_config_addr;
	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 */
#endif
	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 */
#ifdef CONFIG_PPC_ISERIES
	struct	list_head Device_List;
	int	Irq;			/* Assigned IRQ */
	int	Flags;			/* Possible flags(disable/bist)*/
	u8	LogicalSlot;		/* Hv Slot Index for Tces */
#endif
	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 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) */
}

extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
					 struct device_node *dev, int primary);

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;
}

extern struct pci_controller *
pcibios_alloc_controller(struct device_node *dev);
extern void pcibios_free_controller(struct pci_controller *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 /* CONFIG_PPC64 */
#endif
Commit	Line	Data
047ea784 PM	1	#ifndef _ASM_POWERPC_PCI_BRIDGE_H
	2	#define _ASM_POWERPC_PCI_BRIDGE_H
	3
	4	#ifndef CONFIG_PPC64
	5	#include <asm-ppc/pci-bridge.h>
	6	#else
1da177e4 LT	7
1da177e4 LT	8	#include <linux/pci.h>
76f9f87f	9	#include <linux/list.h>
1da177e4 LT	10
	11	/*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public License
	14	* as published by the Free Software Foundation; either version
	15	* 2 of the License, or (at your option) any later version.
	16	*/
	17
	18	/*
	19	* Structure of a PCI controller (host bridge)
	20	*/
	21	struct pci_controller {
	22	struct pci_bus *bus;
	23	char is_dynamic;
	24	void *arch_data;
	25	struct list_head list_node;
	26
	27	int first_busno;
	28	int last_busno;
	29
	30	void __iomem *io_base_virt;
	31	unsigned long io_base_phys;
	32
	33	/* Some machines have a non 1:1 mapping of
	34	* the PCI memory space in the CPU bus space
	35	*/
	36	unsigned long pci_mem_offset;
	37	unsigned long pci_io_size;
	38
	39	struct pci_ops *ops;
	40	volatile unsigned int __iomem *cfg_addr;
17a6392d	41	volatile void __iomem *cfg_data;
1da177e4 LT	42
	43	/* Currently, we limit ourselves to 1 IO range and 3 mem
	44	* ranges since the common pci_bus structure can't handle more
	45	*/
	46	struct resource io_resource;
	47	struct resource mem_resources[3];
	48	int global_number;
	49	int local_number;
	50	unsigned long buid;
	51	unsigned long dma_window_base_cur;
	52	unsigned long dma_window_size;
	53	};
	54
1635317f PM	55	/*
	56	* PCI stuff, for nodes representing PCI devices, pointed to
	57	* by device_node->data.
	58	*/
	59	struct pci_controller;
	60	struct iommu_table;
	61
	62	struct pci_dn {
	63	int busno; /* for pci devices */
	64	int bussubno; /* for pci devices */
	65	int devfn; /* for pci devices */
b5166cc2 BH	66
b5166cc2 BH	67	#ifdef CONFIG_PPC_PSERIES
1635317f PM	68	int eeh_mode; /* See eeh.h for possible EEH_MODEs */
1635317f PM	69	int eeh_config_addr;
1635317f PM	70	int eeh_check_count; /* # times driver ignored error */
	71	int eeh_freeze_count; /* # times this device froze up. */
	72	int eeh_is_bridge; /* device is pci-to-pci bridge */
b5166cc2	73	#endif
1635317f PM	74	int pci_ext_config_space; /* for pci devices */
	75	struct pci_controller phb; / for pci devices */
	76	struct iommu_table iommu_table; / for phb's or bridges */
	77	struct pci_dev pcidev; / back-pointer to the pci device */
	78	struct device_node node; / back-pointer to the device_node */
252e75a5	79	#ifdef CONFIG_PPC_ISERIES
76f9f87f	80	struct list_head Device_List;
b5166cc2 BH	81	int Irq; /* Assigned IRQ */
	82	int Flags; /* Possible flags(disable/bist)*/
	83	u8 LogicalSlot; /* Hv Slot Index for Tces */
252e75a5	84	#endif
1635317f PM	85	u32 config_space[16]; /* saved PCI config space */
	86	};
	87
	88	/* Get the pointer to a device_node's pci_dn */
	89	#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
	90
1da177e4 LT	91	struct device_node fetch_dev_dn(struct pci_dev dev);
1da177e4 LT	92
1635317f PM	93	/* Get a device_node from a pci_dev. This code must be fast except
	94	* in the case where the sysdata is incorrect and needs to be fixed
	95	* up (this will only happen once).
	96	* In this case the sysdata will have been inherited from a PCI host
	97	* bridge or a PCI-PCI bridge further up the tree, so it will point
	98	* to a valid struct pci_dn, just not the one we want.
1da177e4 LT	99	*/
	100	static inline struct device_node pci_device_to_OF_node(struct pci_dev dev)
	101	{
	102	struct device_node *dn = dev->sysdata;
1635317f	103	struct pci_dn *pdn = dn->data;
1da177e4	104
1635317f	105	if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
1da177e4	106	return dn; /* fast path. sysdata is good */
1635317f	107	return fetch_dev_dn(dev);
1da177e4 LT	108	}
1da177e4 LT	109
40ef8cbc PM	110	static inline int pci_device_from_OF_node(struct device_node *np,
	111	u8 bus, u8 devfn)
	112	{
	113	if (!PCI_DN(np))
	114	return -ENODEV;
	115	*bus = PCI_DN(np)->busno;
	116	*devfn = PCI_DN(np)->devfn;
	117	return 0;
	118	}
	119
1da177e4 LT	120	static inline struct device_node pci_bus_to_OF_node(struct pci_bus bus)
	121	{
	122	if (bus->self)
	123	return pci_device_to_OF_node(bus->self);
	124	else
	125	return bus->sysdata; /* Must be root bus (PHB) */
	126	}
	127
	128	extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
f7abbc19	129	struct device_node *dev, int primary);
1da177e4 LT	130
	131	extern int pcibios_remove_root_bus(struct pci_controller *phb);
	132
	133	extern void phbs_remap_io(void);
	134
	135	static inline struct pci_controller pci_bus_to_host(struct pci_bus bus)
	136	{
	137	struct device_node *busdn = bus->sysdata;
	138
	139	BUG_ON(busdn == NULL);
1635317f	140	return PCI_DN(busdn)->phb;
1da177e4 LT	141	}
1da177e4 LT	142
b5166cc2 BH	143	extern struct pci_controller *
	144	pcibios_alloc_controller(struct device_node *dev);
	145	extern void pcibios_free_controller(struct pci_controller *phb);
	146
4267292b PM	147	/* Return values for ppc_md.pci_probe_mode function */
	148	#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
	149	#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
	150	#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
	151
047ea784	152	#endif /* CONFIG_PPC64 */
1da177e4	153	#endif