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/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 } __packed __aligned(64); 48 49 enum zpci_state { 50 ZPCI_FN_STATE_RESERVED, 51 ZPCI_FN_STATE_STANDBY, 52 ZPCI_FN_STATE_CONFIGURED, 53 ZPCI_FN_STATE_ONLINE, 54 NR_ZPCI_FN_STATES, 55 }; 56 57 struct zpci_bar_struct { 58 struct resource *res; /* bus resource */ 59 u32 val; /* bar start & 3 flag bits */ 60 u16 map_idx; /* index into bar mapping array */ 61 u8 size; /* order 2 exponent */ 62 }; 63 64 struct s390_domain; 65 66 /* Private data per function */ 67 struct zpci_dev { 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 struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 123 }; 124 125 static inline bool zdev_enabled(struct zpci_dev *zdev) 126 { 127 return (zdev->fh & (1UL << 31)) ? true : false; 128 } 129 130 extern const struct attribute_group *zpci_attr_groups[]; 131 132 /* ----------------------------------------------------------------------------- 133 Prototypes 134 ----------------------------------------------------------------------------- */ 135 /* Base stuff */ 136 int zpci_create_device(struct zpci_dev *); 137 int zpci_enable_device(struct zpci_dev *); 138 int zpci_disable_device(struct zpci_dev *); 139 void zpci_stop_device(struct zpci_dev *); 140 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 141 int zpci_unregister_ioat(struct zpci_dev *, u8); 142 143 /* CLP */ 144 int clp_scan_pci_devices(void); 145 int clp_rescan_pci_devices(void); 146 int clp_rescan_pci_devices_simple(void); 147 int clp_add_pci_device(u32, u32, int); 148 int clp_enable_fh(struct zpci_dev *, u8); 149 int clp_disable_fh(struct zpci_dev *); 150 151 #ifdef CONFIG_PCI 152 /* Error handling and recovery */ 153 void zpci_event_error(void *); 154 void zpci_event_availability(void *); 155 void zpci_rescan(void); 156 bool zpci_is_enabled(void); 157 #else /* CONFIG_PCI */ 158 static inline void zpci_event_error(void *e) {} 159 static inline void zpci_event_availability(void *e) {} 160 static inline void zpci_rescan(void) {} 161 #endif /* CONFIG_PCI */ 162 163 #ifdef CONFIG_HOTPLUG_PCI_S390 164 int zpci_init_slot(struct zpci_dev *); 165 void zpci_exit_slot(struct zpci_dev *); 166 #else /* CONFIG_HOTPLUG_PCI_S390 */ 167 static inline int zpci_init_slot(struct zpci_dev *zdev) 168 { 169 return 0; 170 } 171 static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 172 #endif /* CONFIG_HOTPLUG_PCI_S390 */ 173 174 /* Helpers */ 175 static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 176 { 177 return pdev->sysdata; 178 } 179 180 struct zpci_dev *get_zdev_by_fid(u32); 181 182 /* DMA */ 183 int zpci_dma_init(void); 184 void zpci_dma_exit(void); 185 186 /* FMB */ 187 int zpci_fmb_enable_device(struct zpci_dev *); 188 int zpci_fmb_disable_device(struct zpci_dev *); 189 190 /* Debug */ 191 int zpci_debug_init(void); 192 void zpci_debug_exit(void); 193 void zpci_debug_init_device(struct zpci_dev *, const char *); 194 void zpci_debug_exit_device(struct zpci_dev *); 195 void zpci_debug_info(struct zpci_dev *, struct seq_file *); 196 197 #ifdef CONFIG_NUMA 198 199 /* Returns the node based on PCI bus */ 200 static inline int __pcibus_to_node(const struct pci_bus *bus) 201 { 202 return NUMA_NO_NODE; 203 } 204 205 static inline const struct cpumask * 206 cpumask_of_pcibus(const struct pci_bus *bus) 207 { 208 return cpu_online_mask; 209 } 210 211 #endif /* CONFIG_NUMA */ 212 213 #endif 214