| /* 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, |
| ZPCI_FN_STATE_ONLINE = 3, |
| }; |
| |
| 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 is_physfn : 1; |
| u8 reserved : 5; |
| 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; |
| |
| 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 */ |
| int zpci_create_device(struct zpci_dev *); |
| void zpci_remove_device(struct zpci_dev *zdev); |
| int zpci_enable_device(struct zpci_dev *); |
| int zpci_disable_device(struct zpci_dev *); |
| 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_scan_pci_devices(void); |
| int clp_rescan_pci_devices(void); |
| int clp_rescan_pci_devices_simple(u32 *fid); |
| int clp_add_pci_device(u32, u32, int); |
| 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 *); |
| void zpci_rescan(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) {} |
| static inline void zpci_rescan(void) {} |
| #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 *); |
| void zpci_debug_info(struct zpci_dev *, struct seq_file *); |
| |
| /* 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 |