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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_S390_PCI_H
#define __ASM_S390_PCI_H
#include <linux/pci.h>
#include <linux/mutex.h>
#include <linux/iommu.h>
#include <linux/pci_hotplug.h>
#include <asm-generic/pci.h>
#include <asm/pci_clp.h>
#include <asm/pci_debug.h>
#include <asm/sclp.h>
#define PCIBIOS_MIN_IO 0x1000
#define PCIBIOS_MIN_MEM 0x10000000
#define pcibios_assign_all_busses() (0)
void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
void pci_iounmap(struct pci_dev *, void __iomem *);
int pci_domain_nr(struct pci_bus *);
int pci_proc_domain(struct pci_bus *);
#define ZPCI_BUS_NR 0 /* default bus number */
#define ZPCI_NR_DMA_SPACES 1
#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
#define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16)
#ifdef PCI
#if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
# error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
#endif
#endif /* PCI */
/* PCI Function Controls */
#define ZPCI_FC_FN_ENABLED 0x80
#define ZPCI_FC_ERROR 0x40
#define ZPCI_FC_BLOCKED 0x20
#define ZPCI_FC_DMA_ENABLED 0x10
#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
struct zpci_fmb_fmt0 {
u64 dma_rbytes;
u64 dma_wbytes;
};
struct zpci_fmb_fmt1 {
u64 rx_bytes;
u64 rx_packets;
u64 tx_bytes;
u64 tx_packets;
};
struct zpci_fmb_fmt2 {
u64 consumed_work_units;
u64 max_work_units;
};
struct zpci_fmb_fmt3 {
u64 tx_bytes;
};
struct zpci_fmb {
u32 format : 8;
u32 fmt_ind : 24;
u32 samples;
u64 last_update;
/* common counters */
u64 ld_ops;
u64 st_ops;
u64 stb_ops;
u64 rpcit_ops;
/* format specific counters */
union {
struct zpci_fmb_fmt0 fmt0;
struct zpci_fmb_fmt1 fmt1;
struct zpci_fmb_fmt2 fmt2;
struct zpci_fmb_fmt3 fmt3;
};
} __packed __aligned(128);
enum zpci_state {
ZPCI_FN_STATE_STANDBY = 0,
ZPCI_FN_STATE_CONFIGURED = 1,
ZPCI_FN_STATE_RESERVED = 2,
};
struct zpci_bar_struct {
struct resource *res; /* bus resource */
void __iomem *mio_wb;
void __iomem *mio_wt;
u32 val; /* bar start & 3 flag bits */
u16 map_idx; /* index into bar mapping array */
u8 size; /* order 2 exponent */
};
struct s390_domain;
#define ZPCI_FUNCTIONS_PER_BUS 256
struct zpci_bus {
struct kref kref;
struct pci_bus *bus;
struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS];
struct list_head resources;
struct list_head bus_next;
struct resource bus_resource;
int pchid;
int domain_nr;
bool multifunction;
enum pci_bus_speed max_bus_speed;
};
/* Private data per function */
struct zpci_dev {
struct zpci_bus *zbus;
struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
struct list_head bus_next;
struct kref kref;
struct hotplug_slot hotplug_slot;
enum zpci_state state;
u32 fid; /* function ID, used by sclp */
u32 fh; /* function handle, used by insn's */
u16 vfn; /* virtual function number */
u16 pchid; /* physical channel ID */
u8 pfgid; /* function group ID */
u8 pft; /* pci function type */
u8 port;
u8 rid_available : 1;
u8 has_hp_slot : 1;
u8 has_resources : 1;
u8 is_physfn : 1;
u8 util_str_avail : 1;
u8 reserved : 3;
unsigned int devfn; /* DEVFN part of the RID*/
struct mutex lock;
u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
u32 uid; /* user defined id */
u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
/* IRQ stuff */
u64 msi_addr; /* MSI address */
unsigned int max_msi; /* maximum number of MSI's */
unsigned int msi_first_bit;
unsigned int msi_nr_irqs;
struct airq_iv *aibv; /* adapter interrupt bit vector */
unsigned long aisb; /* number of the summary bit */
/* DMA stuff */
unsigned long *dma_table;
spinlock_t dma_table_lock;
int tlb_refresh;
spinlock_t iommu_bitmap_lock;
unsigned long *iommu_bitmap;
unsigned long *lazy_bitmap;
unsigned long iommu_size;
unsigned long iommu_pages;
unsigned int next_bit;
struct iommu_device iommu_dev; /* IOMMU core handle */
char res_name[16];
bool mio_capable;
struct zpci_bar_struct bars[PCI_STD_NUM_BARS];
u64 start_dma; /* Start of available DMA addresses */
u64 end_dma; /* End of available DMA addresses */
u64 dma_mask; /* DMA address space mask */
/* Function measurement block */
struct zpci_fmb *fmb;
u16 fmb_update; /* update interval */
u16 fmb_length;
/* software counters */
atomic64_t allocated_pages;
atomic64_t mapped_pages;
atomic64_t unmapped_pages;
u8 version;
enum pci_bus_speed max_bus_speed;
struct dentry *debugfs_dev;
struct s390_domain *s390_domain; /* s390 IOMMU domain data */
};
static inline bool zdev_enabled(struct zpci_dev *zdev)
{
return (zdev->fh & (1UL << 31)) ? true : false;
}
extern const struct attribute_group *zpci_attr_groups[];
extern unsigned int s390_pci_force_floating __initdata;
extern unsigned int s390_pci_no_rid;
/* -----------------------------------------------------------------------------
Prototypes
----------------------------------------------------------------------------- */
/* Base stuff */
struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
int zpci_enable_device(struct zpci_dev *);
int zpci_disable_device(struct zpci_dev *);
int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
int zpci_deconfigure_device(struct zpci_dev *zdev);
void zpci_device_reserved(struct zpci_dev *zdev);
bool zpci_is_device_configured(struct zpci_dev *zdev);
int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
int zpci_unregister_ioat(struct zpci_dev *, u8);
void zpci_remove_reserved_devices(void);
/* CLP */
int clp_setup_writeback_mio(void);
int clp_scan_pci_devices(void);
int clp_query_pci_fn(struct zpci_dev *zdev);
int clp_enable_fh(struct zpci_dev *, u8);
int clp_disable_fh(struct zpci_dev *);
int clp_get_state(u32 fid, enum zpci_state *state);
/* UID */
void update_uid_checking(bool new);
/* IOMMU Interface */
int zpci_init_iommu(struct zpci_dev *zdev);
void zpci_destroy_iommu(struct zpci_dev *zdev);
#ifdef CONFIG_PCI
static inline bool zpci_use_mio(struct zpci_dev *zdev)
{
return static_branch_likely(&have_mio) && zdev->mio_capable;
}
/* Error handling and recovery */
void zpci_event_error(void *);
void zpci_event_availability(void *);
bool zpci_is_enabled(void);
#else /* CONFIG_PCI */
static inline void zpci_event_error(void *e) {}
static inline void zpci_event_availability(void *e) {}
#endif /* CONFIG_PCI */
#ifdef CONFIG_HOTPLUG_PCI_S390
int zpci_init_slot(struct zpci_dev *);
void zpci_exit_slot(struct zpci_dev *);
#else /* CONFIG_HOTPLUG_PCI_S390 */
static inline int zpci_init_slot(struct zpci_dev *zdev)
{
return 0;
}
static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
#endif /* CONFIG_HOTPLUG_PCI_S390 */
/* Helpers */
static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
{
struct zpci_bus *zbus = pdev->sysdata;
return zbus->function[pdev->devfn];
}
static inline struct zpci_dev *to_zpci_dev(struct device *dev)
{
return to_zpci(to_pci_dev(dev));
}
struct zpci_dev *get_zdev_by_fid(u32);
/* DMA */
int zpci_dma_init(void);
void zpci_dma_exit(void);
int __init zpci_irq_init(void);
void __init zpci_irq_exit(void);
/* FMB */
int zpci_fmb_enable_device(struct zpci_dev *);
int zpci_fmb_disable_device(struct zpci_dev *);
/* Debug */
int zpci_debug_init(void);
void zpci_debug_exit(void);
void zpci_debug_init_device(struct zpci_dev *, const char *);
void zpci_debug_exit_device(struct zpci_dev *);
/* Error reporting */
int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
#ifdef CONFIG_NUMA
/* Returns the node based on PCI bus */
static inline int __pcibus_to_node(const struct pci_bus *bus)
{
return NUMA_NO_NODE;
}
static inline const struct cpumask *
cpumask_of_pcibus(const struct pci_bus *bus)
{
return cpu_online_mask;
}
#endif /* CONFIG_NUMA */
#endif
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