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