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 #define ZPCI_MSI_VEC_BITS 11 54 #define ZPCI_MSI_VEC_MAX (1 << ZPCI_MSI_VEC_BITS) 55 #define ZPCI_MSI_VEC_MASK (ZPCI_MSI_VEC_MAX - 1) 56 57 enum zpci_state { 58 ZPCI_FN_STATE_RESERVED, 59 ZPCI_FN_STATE_STANDBY, 60 ZPCI_FN_STATE_CONFIGURED, 61 ZPCI_FN_STATE_ONLINE, 62 NR_ZPCI_FN_STATES, 63 }; 64 65 struct zpci_bar_struct { 66 struct resource *res; /* bus resource */ 67 u32 val; /* bar start & 3 flag bits */ 68 u16 map_idx; /* index into bar mapping array */ 69 u8 size; /* order 2 exponent */ 70 }; 71 72 /* Private data per function */ 73 struct zpci_dev { 74 struct pci_dev *pdev; 75 struct pci_bus *bus; 76 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 77 78 enum zpci_state state; 79 u32 fid; /* function ID, used by sclp */ 80 u32 fh; /* function handle, used by insn's */ 81 u16 vfn; /* virtual function number */ 82 u16 pchid; /* physical channel ID */ 83 u8 pfgid; /* function group ID */ 84 u8 pft; /* pci function type */ 85 u16 domain; 86 87 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 88 u32 uid; /* user defined id */ 89 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 90 91 /* IRQ stuff */ 92 u64 msi_addr; /* MSI address */ 93 struct airq_iv *aibv; /* adapter interrupt bit vector */ 94 unsigned int aisb; /* number of the summary bit */ 95 96 /* DMA stuff */ 97 unsigned long *dma_table; 98 spinlock_t dma_table_lock; 99 int tlb_refresh; 100 101 spinlock_t iommu_bitmap_lock; 102 unsigned long *iommu_bitmap; 103 unsigned long iommu_size; 104 unsigned long iommu_pages; 105 unsigned int next_bit; 106 107 char res_name[16]; 108 struct zpci_bar_struct bars[PCI_BAR_COUNT]; 109 110 u64 start_dma; /* Start of available DMA addresses */ 111 u64 end_dma; /* End of available DMA addresses */ 112 u64 dma_mask; /* DMA address space mask */ 113 114 /* Function measurement block */ 115 struct zpci_fmb *fmb; 116 u16 fmb_update; /* update interval */ 117 118 enum pci_bus_speed max_bus_speed; 119 120 struct dentry *debugfs_dev; 121 struct dentry *debugfs_perf; 122 }; 123 124 static inline bool zdev_enabled(struct zpci_dev *zdev) 125 { 126 return (zdev->fh & (1UL << 31)) ? true : false; 127 } 128 129 extern const struct attribute_group *zpci_attr_groups[]; 130 131 /* ----------------------------------------------------------------------------- 132 Prototypes 133 ----------------------------------------------------------------------------- */ 134 /* Base stuff */ 135 int zpci_create_device(struct zpci_dev *); 136 int zpci_enable_device(struct zpci_dev *); 137 int zpci_disable_device(struct zpci_dev *); 138 void zpci_stop_device(struct zpci_dev *); 139 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 140 int zpci_unregister_ioat(struct zpci_dev *, u8); 141 142 /* CLP */ 143 int clp_scan_pci_devices(void); 144 int clp_rescan_pci_devices(void); 145 int clp_rescan_pci_devices_simple(void); 146 int clp_add_pci_device(u32, u32, int); 147 int clp_enable_fh(struct zpci_dev *, u8); 148 int clp_disable_fh(struct zpci_dev *); 149 150 #ifdef CONFIG_PCI 151 /* Error handling and recovery */ 152 void zpci_event_error(void *); 153 void zpci_event_availability(void *); 154 void zpci_rescan(void); 155 bool zpci_is_enabled(void); 156 #else /* CONFIG_PCI */ 157 static inline void zpci_event_error(void *e) {} 158 static inline void zpci_event_availability(void *e) {} 159 static inline void zpci_rescan(void) {} 160 #endif /* CONFIG_PCI */ 161 162 #ifdef CONFIG_HOTPLUG_PCI_S390 163 int zpci_init_slot(struct zpci_dev *); 164 void zpci_exit_slot(struct zpci_dev *); 165 #else /* CONFIG_HOTPLUG_PCI_S390 */ 166 static inline int zpci_init_slot(struct zpci_dev *zdev) 167 { 168 return 0; 169 } 170 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 171 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 172 173 /* Helpers */ 174 struct zpci_dev *get_zdev(struct pci_dev *); 175 struct zpci_dev *get_zdev_by_fid(u32); 176 177 /* DMA */ 178 int zpci_dma_init(void); 179 void zpci_dma_exit(void); 180 181 /* FMB */ 182 int zpci_fmb_enable_device(struct zpci_dev *); 183 int zpci_fmb_disable_device(struct zpci_dev *); 184 185 /* Debug */ 186 int zpci_debug_init(void); 187 void zpci_debug_exit(void); 188 void zpci_debug_init_device(struct zpci_dev *); 189 void zpci_debug_exit_device(struct zpci_dev *); 190 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 191 192 #endif 193