1#ifndef __ASM_S390_PCI_H 2#define __ASM_S390_PCI_H 3 4/* must be set before including asm-generic/pci.h */ 5#define PCI_DMA_BUS_IS_PHYS (0) 6/* must be set before including pci_clp.h */ 7#define PCI_BAR_COUNT 6 8 9#include <linux/pci.h> 10#include <linux/mutex.h> 11#include <asm-generic/pci.h> 12#include <asm-generic/pci-dma-compat.h> 13#include <asm/pci_clp.h> 14#include <asm/pci_debug.h> 15 16#define PCIBIOS_MIN_IO 0x1000 17#define PCIBIOS_MIN_MEM 0x10000000 18 19#define pcibios_assign_all_busses() (0) 20 21void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 22void pci_iounmap(struct pci_dev *, void __iomem *); 23int pci_domain_nr(struct pci_bus *); 24int pci_proc_domain(struct pci_bus *); 25 26#define ZPCI_BUS_NR 0 /* default bus number */ 27#define ZPCI_DEVFN 0 /* default device number */ 28 29/* PCI Function Controls */ 30#define ZPCI_FC_FN_ENABLED 0x80 31#define ZPCI_FC_ERROR 0x40 32#define ZPCI_FC_BLOCKED 0x20 33#define ZPCI_FC_DMA_ENABLED 0x10 34 35struct zpci_fmb { 36 u32 format : 8; 37 u32 dma_valid : 1; 38 u32 : 23; 39 u32 samples; 40 u64 last_update; 41 /* hardware counters */ 42 u64 ld_ops; 43 u64 st_ops; 44 u64 stb_ops; 45 u64 rpcit_ops; 46 u64 dma_rbytes; 47 u64 dma_wbytes; 48 u64 pad[2]; 49} __packed __aligned(128); 50 51enum zpci_state { 52 ZPCI_FN_STATE_RESERVED, 53 ZPCI_FN_STATE_STANDBY, 54 ZPCI_FN_STATE_CONFIGURED, 55 ZPCI_FN_STATE_ONLINE, 56 NR_ZPCI_FN_STATES, 57}; 58 59struct zpci_bar_struct { 60 struct resource *res; /* bus resource */ 61 u32 val; /* bar start & 3 flag bits */ 62 u16 map_idx; /* index into bar mapping array */ 63 u8 size; /* order 2 exponent */ 64}; 65 66/* Private data per function */ 67struct zpci_dev { 68 struct pci_dev *pdev; 69 struct pci_bus *bus; 70 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 71 72 enum zpci_state state; 73 u32 fid; /* function ID, used by sclp */ 74 u32 fh; /* function handle, used by insn's */ 75 u16 vfn; /* virtual function number */ 76 u16 pchid; /* physical channel ID */ 77 u8 pfgid; /* function group ID */ 78 u8 pft; /* pci function type */ 79 u16 domain; 80 81 struct mutex lock; 82 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 83 u32 uid; /* user defined id */ 84 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 85 86 /* IRQ stuff */ 87 u64 msi_addr; /* MSI address */ 88 unsigned int max_msi; /* maximum number of MSI's */ 89 struct airq_iv *aibv; /* adapter interrupt bit vector */ 90 unsigned int aisb; /* number of the summary bit */ 91 92 /* DMA stuff */ 93 unsigned long *dma_table; 94 spinlock_t dma_table_lock; 95 int tlb_refresh; 96 97 spinlock_t iommu_bitmap_lock; 98 unsigned long *iommu_bitmap; 99 unsigned long iommu_size; 100 unsigned long iommu_pages; 101 unsigned int next_bit; 102 103 char res_name[16]; 104 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 105 106 u64 start_dma; /* Start of available DMA addresses */ 107 u64 end_dma; /* End of available DMA addresses */ 108 u64 dma_mask; /* DMA address space mask */ 109 110 /* Function measurement block */ 111 struct zpci_fmb *fmb; 112 u16 fmb_update; /* update interval */ 113 /* software counters */ 114 atomic64_t allocated_pages; 115 atomic64_t mapped_pages; 116 atomic64_t unmapped_pages; 117 118 enum pci_bus_speed max_bus_speed; 119 120 struct dentry *debugfs_dev; 121 struct dentry *debugfs_perf; 122}; 123 124static inline bool zdev_enabled(struct zpci_dev *zdev) 125{ 126 return (zdev->fh & (1UL << 31)) ? true : false; 127} 128 129extern const struct attribute_group *zpci_attr_groups[]; 130 131/* ----------------------------------------------------------------------------- 132 Prototypes 133----------------------------------------------------------------------------- */ 134/* Base stuff */ 135int zpci_create_device(struct zpci_dev *); 136int zpci_enable_device(struct zpci_dev *); 137int zpci_disable_device(struct zpci_dev *); 138void zpci_stop_device(struct zpci_dev *); 139int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 140int zpci_unregister_ioat(struct zpci_dev *, u8); 141 142/* CLP */ 143int clp_scan_pci_devices(void); 144int clp_rescan_pci_devices(void); 145int clp_rescan_pci_devices_simple(void); 146int clp_add_pci_device(u32, u32, int); 147int clp_enable_fh(struct zpci_dev *, u8); 148int clp_disable_fh(struct zpci_dev *); 149 150#ifdef CONFIG_PCI 151/* Error handling and recovery */ 152void zpci_event_error(void *); 153void zpci_event_availability(void *); 154void zpci_rescan(void); 155bool zpci_is_enabled(void); 156#else /* CONFIG_PCI */ 157static inline void zpci_event_error(void *e) {} 158static inline void zpci_event_availability(void *e) {} 159static inline void zpci_rescan(void) {} 160#endif /* CONFIG_PCI */ 161 162#ifdef CONFIG_HOTPLUG_PCI_S390 163int zpci_init_slot(struct zpci_dev *); 164void zpci_exit_slot(struct zpci_dev *); 165#else /* CONFIG_HOTPLUG_PCI_S390 */ 166static inline int zpci_init_slot(struct zpci_dev *zdev) 167{ 168 return 0; 169} 170static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 171#endif /* CONFIG_HOTPLUG_PCI_S390 */ 172 173/* Helpers */ 174struct zpci_dev *get_zdev(struct pci_dev *); 175struct zpci_dev *get_zdev_by_fid(u32); 176 177/* DMA */ 178int zpci_dma_init(void); 179void zpci_dma_exit(void); 180 181/* FMB */ 182int zpci_fmb_enable_device(struct zpci_dev *); 183int zpci_fmb_disable_device(struct zpci_dev *); 184 185/* Debug */ 186int zpci_debug_init(void); 187void zpci_debug_exit(void); 188void zpci_debug_init_device(struct zpci_dev *); 189void zpci_debug_exit_device(struct zpci_dev *); 190void zpci_debug_info(struct zpci_dev *, struct seq_file *); 191 192#endif 193