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/* SPDX-License-Identifier: GPL-2.0-or-later */
#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);
int (*setup_msi_irqs)(struct pci_dev *pdev,
int nvec, int type);
void (*teardown_msi_irqs)(struct pci_dev *pdev);
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;
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;
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_EXT_REG 0x00000002
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 */
struct eeh_dev *edev; /* eeh device */
unsigned int pe_number;
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);
struct pci_dn *add_sriov_vf_pdns(struct pci_dev *pdev);
void remove_sriov_vf_pdns(struct pci_dev *pdev);
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;
#define pdn_to_eeh_dev(x) (NULL)
/** 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);
#define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
#define PHB_SET_NODE(PHB, NODE) ((PHB)->node = NUMA_NO_NODE)
#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);
extern int pcibios_vaddr_is_ioport(void __iomem *address);
static inline int pcibios_vaddr_is_ioport(void __iomem *address)
return 0;
#endif /* CONFIG_PCI */
#endif /* __KERNEL__ */