FM / asm

/usr/src/linux-headers-5.15.0-190/arch/powerpc/include/asm/

/usr/src/linux-headers-5.15.0-190/arch/powerpc/include/asm

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Edit: /usr/src/linux-headers-5.15.0-190/arch/powerpc/include/asm/pci-bridge.h (9481B)

/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_PCI_BRIDGE_H
#define _ASM_POWERPC_PCI_BRIDGE_H
#ifdef __KERNEL__
/*
 */
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/ioport.h>
#include <linux/numa.h>

struct device_node;

/*
 * PCI controller operations
 */
struct pci_controller_ops {
	void		(*dma_dev_setup)(struct pci_dev *pdev);
	void		(*dma_bus_setup)(struct pci_bus *bus);
	bool		(*iommu_bypass_supported)(struct pci_dev *pdev,
				u64 mask);

int		(*probe_mode)(struct pci_bus *bus);

/* Called when pci_enable_device() is called. Returns true to
	 * allow assignment/enabling of the device. */
	bool		(*enable_device_hook)(struct pci_dev *pdev);

void		(*disable_device)(struct pci_dev *pdev);

void		(*release_device)(struct pci_dev *pdev);

/* Called during PCI resource reassignment */
	resource_size_t (*window_alignment)(struct pci_bus *bus,
					    unsigned long type);
	void		(*setup_bridge)(struct pci_bus *bus,
					unsigned long type);
	void		(*reset_secondary_bus)(struct pci_dev *pdev);

#ifdef CONFIG_PCI_MSI
	int		(*setup_msi_irqs)(struct pci_dev *pdev,
					  int nvec, int type);
	void		(*teardown_msi_irqs)(struct pci_dev *pdev);
#endif

void		(*shutdown)(struct pci_controller *hose);
};

/*
 * 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 __iomem *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;

/* IRQ domain hierarchy */
	struct irq_domain	*dev_domain;
	struct irq_domain	*msi_domain;
	struct fwnode_handle	*fwnode;
};

/* 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);

#else	/* CONFIG_PPC64 */

/*
 * PCI stuff, for nodes representing PCI devices, pointed to
 * by device_node->data.
 */
struct iommu_table;

struct pci_dn {
	int     flags;
#define PCI_DN_FLAG_IOV_VF	0x01
#define PCI_DN_FLAG_DEAD	0x02    /* Device has been hot-removed */

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_group *table_group;	/* for phb's or bridges */

int	pci_ext_config_space;	/* for pci devices */
#ifdef CONFIG_EEH
	struct eeh_dev *edev;		/* eeh device */
#endif
#define IODA_INVALID_PE		0xFFFFFFFF
	unsigned int pe_number;
#ifdef CONFIG_PCI_IOV
	u16     vfs_expanded;		/* number of VFs IOV BAR expanded */
	u16     num_vfs;		/* number of VFs enabled*/
	unsigned int *pe_num_map;	/* PE# for the first VF PE or array */
	bool    m64_single_mode;	/* Use M64 BAR in Single Mode */
#define IODA_INVALID_M64        (-1)
	int     (*m64_map)[PCI_SRIOV_NUM_BARS];	/* Only used on powernv */
	int     last_allow_rc;			/* Only used on pseries */
#endif /* CONFIG_PCI_IOV */
	int	mps;			/* Maximum Payload Size */
	struct list_head child_list;
	struct list_head list;
	struct resource holes[PCI_SRIOV_NUM_BARS];
};

/* 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 struct pci_dn *pci_add_device_node_info(struct pci_controller *hose,
					       struct device_node *dn);
extern void pci_remove_device_node_info(struct device_node *dn);

#ifdef CONFIG_PCI_IOV
struct pci_dn *add_sriov_vf_pdns(struct pci_dev *pdev);
void remove_sriov_vf_pdns(struct pci_dev *pdev);
#endif

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 *pci_find_bus_by_node(struct device_node *dn);

/** Remove all of the PCI devices under this bus */
extern void pci_hp_remove_devices(struct pci_bus *bus);

/** Discover new pci devices under this bus, and add them */
extern void pci_hp_add_devices(struct pci_bus *bus);

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 = NUMA_NO_NODE)
#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);

extern struct pci_controller *pci_find_controller_for_domain(int domain_nr);

/* 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_free_controller_deferred(struct pci_host_bridge *bridge);

#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 */

#endif	/* __KERNEL__ */
#endif	/* _ASM_POWERPC_PCI_BRIDGE_H */

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