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