diff options
Diffstat (limited to 'arch/s390/include/asm/pci.h')
| -rw-r--r-- | arch/s390/include/asm/pci.h | 185 |
1 files changed, 144 insertions, 41 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index f36b4b726057..a32f465ecf73 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -1,18 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_S390_PCI_H #define __ASM_S390_PCI_H -/* must be set before including asm-generic/pci.h */ -#define PCI_DMA_BUS_IS_PHYS (0) -/* must be set before including pci_clp.h */ -#define PCI_BAR_COUNT 6 - #include <linux/pci.h> #include <linux/mutex.h> -#include <asm-generic/pci.h> +#include <linux/iommu.h> +#include <linux/pci_hotplug.h> #include <asm/pci_clp.h> #include <asm/pci_debug.h> +#include <asm/pci_insn.h> #include <asm/sclp.h> +#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1 +#define arch_can_pci_mmap_wc() 1 + #define PCIBIOS_MIN_IO 0x1000 #define PCIBIOS_MIN_MEM 0x10000000 @@ -24,7 +25,16 @@ int pci_domain_nr(struct pci_bus *); int pci_proc_domain(struct pci_bus *); #define ZPCI_BUS_NR 0 /* default bus number */ -#define ZPCI_DEVFN 0 /* default device 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 @@ -51,6 +61,10 @@ struct zpci_fmb_fmt2 { u64 max_work_units; }; +struct zpci_fmb_fmt3 { + u64 tx_bytes; +}; + struct zpci_fmb { u32 format : 8; u32 fmt_ind : 24; @@ -66,6 +80,7 @@ struct zpci_fmb { struct zpci_fmb_fmt0 fmt0; struct zpci_fmb_fmt1 fmt1; struct zpci_fmb_fmt2 fmt2; + struct zpci_fmb_fmt3 fmt3; }; } __packed __aligned(128); @@ -73,33 +88,67 @@ 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; +struct kvm_zdev; + +#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 topo; /* TID if topo_is_tid, PCHID otherwise */ + int domain_nr; + u8 multifunction : 1; + u8 topo_is_tid : 1; + enum pci_bus_speed max_bus_speed; +}; /* Private data per function */ struct zpci_dev { - struct pci_bus *bus; + struct zpci_bus *zbus; struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ + struct list_head iommu_list; + struct kref kref; + struct rcu_head rcu; + struct hotplug_slot hotplug_slot; + struct mutex state_lock; /* protect state changes */ enum zpci_state state; u32 fid; /* function ID, used by sclp */ u32 fh; /* function handle, used by insn's */ + u32 gisa; /* GISA designation for passthrough */ u16 vfn; /* virtual function number */ u16 pchid; /* physical channel ID */ + u16 maxstbl; /* Maximum store block size */ + u16 rid; /* RID as supplied by firmware */ + u16 tid; /* Topology for which RID is valid */ u8 pfgid; /* function group ID */ u8 pft; /* pci function type */ - u16 domain; + u8 port; + u8 fidparm; + u8 dtsm; /* Supported DT mask */ + u8 rid_available : 1; + u8 has_hp_slot : 1; + u8 has_resources : 1; + u8 is_physfn : 1; + u8 util_str_avail : 1; + u8 tid_avail : 1; + u8 rtr_avail : 1; /* Relaxed translation allowed */ + 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 */ @@ -107,43 +156,41 @@ struct zpci_dev { /* 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]; - struct zpci_bar_struct bars[PCI_BAR_COUNT]; + 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 mutex fmb_lock; 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 dentry *debugfs_perf; - struct s390_domain *s390_domain; /* s390 IOMMU domain data */ + /* IOMMU and passthrough */ + struct iommu_domain *s390_domain; /* attached IOMMU domain */ + struct kvm_zdev *kzdev; + struct mutex kzdev_lock; + spinlock_t dom_lock; /* protect s390_domain change */ }; static inline bool zdev_enabled(struct zpci_dev *zdev) @@ -151,39 +198,81 @@ 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 const struct attribute_group zpci_attr_group; +extern const struct attribute_group pfip_attr_group; +extern const struct attribute_group zpci_ident_attr_group; + +#define ARCH_PCI_DEV_GROUPS &zpci_attr_group, \ + &pfip_attr_group, \ + &zpci_ident_attr_group, + +extern unsigned int s390_pci_force_floating __initdata; +extern unsigned int s390_pci_no_rid; + +extern union zpci_sic_iib *zpci_aipb; +extern struct airq_iv *zpci_aif_sbv; /* ----------------------------------------------------------------------------- Prototypes ----------------------------------------------------------------------------- */ /* Base stuff */ -int zpci_create_device(struct zpci_dev *); -void zpci_remove_device(struct zpci_dev *zdev); +struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state); +int zpci_add_device(struct zpci_dev *zdev); int zpci_enable_device(struct zpci_dev *); +int zpci_reenable_device(struct zpci_dev *zdev); int zpci_disable_device(struct zpci_dev *); -int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); +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_scan_devices(void); + +int zpci_hot_reset_device(struct zpci_dev *zdev); +int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64, u8 *); int zpci_unregister_ioat(struct zpci_dev *, u8); void zpci_remove_reserved_devices(void); +void zpci_update_fh(struct zpci_dev *zdev, u32 fh); /* CLP */ -int clp_scan_pci_devices(void); -int clp_rescan_pci_devices(void); -int clp_rescan_pci_devices_simple(void); -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_setup_writeback_mio(void); +int clp_scan_pci_devices(struct list_head *scan_list); +int clp_query_pci_fn(struct zpci_dev *zdev); +int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as); +int clp_disable_fh(struct zpci_dev *zdev, u32 *fh); int clp_get_state(u32 fid, enum zpci_state *state); +int clp_refresh_fh(u32 fid, u32 *fh); + +/* UID */ +void update_uid_checking(bool new); + +/* Firmware Sysfs */ +int __init __zpci_fw_sysfs_init(void); + +static inline int __init zpci_fw_sysfs_init(void) +{ + if (IS_ENABLED(CONFIG_SYSFS)) + return __zpci_fw_sysfs_init(); + return 0; +} + +/* IOMMU Interface */ +int zpci_init_iommu(struct zpci_dev *zdev); +void zpci_destroy_iommu(struct zpci_dev *zdev); +int zpci_iommu_register_ioat(struct zpci_dev *zdev, u8 *status); #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 @@ -200,7 +289,14 @@ static inline void zpci_exit_slot(struct zpci_dev *zdev) {} /* Helpers */ static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) { - return pdev->sysdata; + 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); @@ -208,6 +304,12 @@ struct zpci_dev *get_zdev_by_fid(u32); /* DMA */ int zpci_dma_init(void); void zpci_dma_exit(void); +int zpci_dma_init_device(struct zpci_dev *zdev); +int zpci_dma_exit_device(struct zpci_dev *zdev); + +/* IRQ */ +int __init zpci_irq_init(void); +void __init zpci_irq_exit(void); /* FMB */ int zpci_fmb_enable_device(struct zpci_dev *); @@ -218,10 +320,11 @@ 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 */ +/* Error handling */ int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); +int zpci_clear_error_state(struct zpci_dev *zdev); +int zpci_reset_load_store_blocked(struct zpci_dev *zdev); #ifdef CONFIG_NUMA |